The Centre for Speech Technology Research, The university of Edinburgh

Publications by Maria Wolters

mwolters.bib

@inproceedings{hartswood:13,
  author = {Hartswood, Mark and Wolters, Maria and Ure, Jenny and Anderson, Stuart and Jirotka, Marina},
  title = {Socio-material design for computer mediated social sensemaking},
  abstract = {Telemonitoring healthcare solutions often struggle to provide the hoped for efficiency improvements in managing chronic illness because of the difficulty interpreting sensor data remotely. Computer-Mediated Social Sensemaking (CMSS) is an approach to solving this problem that leverages the patient's social network to supply the missing contextual detail so that remote doctors can make more accurate decisions. However, implementing CMSS solutions is difficult because users need to know who can see which information, and whether private and confidential information is adequately protected. In this paper, we wish to explore how socio-material design solutions might offer ways of making properties of a CMSS solution tangible to participants so that they can control and understand the implications of their participation.},
  month = {April},
  year = {2013},
  pdf = {http://www.cstr.inf.ed.ac.uk/downloads/publications/2013/Hartswood-et-al_Socio-Material-Design-for-Computer-Mediated-Social-Sensemaking.pdf},
  booktitle = {Proc. CHI Workshop on Explorations in Social Interaction Design},
  categories = {social media; eHealth; confidentiality; chronic illness; social sense making; tele care; tele health; privacy}
}
@incollection{vipperla2012,
  editor = {Turner, Kenneth J.},
  author = {Vipperla, Ravichander and Wolters, Maria and Renals, Steve},
  publisher = {IOS Press},
  title = {Spoken dialogue interfaces for older people},
  abstract = {Although speech is a highly natural mode of communication, building robust and usable speech-based interfaces is still a challenge, even if the target user group is restricted to younger users. When designing for older users, there are added complications due to cognitive, physiological, and anatomical ageing. Users may also find it difficult to adapt to the interaction style required by the speech interface. In this chapter, we summarise the work on spoken dialogue interfaces that was carried out during the MATCH project. After a brief overview of relevant aspects of ageing and previous work on spoken dialogue interfaces for older people, we summarise our work on managing spoken interactions (dialogue management), understanding older people's speech (speech recognition), and generating spoken messages that older people can understand (speech synthesis). We conclude with suggestions for design guidelines that have emerged from our work and suggest directions for future research.},
  year = {2012},
  pdf = {http://www.cstr.inf.ed.ac.uk/downloads/publications/2012/08-vipperla-2013.pdf},
  booktitle = {Advances in Home Care Technologies}
}
@inproceedings{wolters-icphs:07,
  author = {Wolters, Maria and Campbell, Pauline and DePlacido, Christine and Liddell, Amy and Owens, David},
  title = {The Effect of Hearing Loss on the Intelligibility of Synthetic Speech},
  booktitle = {Proc. Intl. Conf. Phon. Sci.},
  month = {August},
  year = {2007},
  pdf = {http://www.cstr.inf.ed.ac.uk/downloads/publications/2007/WoltersetalICPhS2007.pdf},
  abstract = {Many factors affect the intelligibility of synthetic speech. One aspect that has been severely neglected in past work is hearing loss. In this study, we investigate whether pure-tone audiometry thresholds across a wide range of frequencies (0.25--20kHz) are correlated with participants' performance on a simple task that involves accurately recalling and processing reminders. Participants' scores correlate not only with thresholds in the frequency ranges commonly associated with speech, but also with extended high-frequency thresholds.},
  categories = {}
}
@inproceedings{goedde:08,
  author = {G\"odde, Florian and M\"oller, Sebastian and Engelbrecht, Klaus-Peter and K\"uhnel, Christine and Schleicher, Robert and Naumann, Anja and Wolters, Maria},
  booktitle = {International Workshop on Intelligent User Interfaces for Ambient Assisted Living},
  title = {Study of a Speech-based Smart Home System with Older Users},
  pages = {17--22},
  year = {2008}
}
@article{Burton2012,
  author = {Burton, Christopher and McKinstry, Brian and Tatar, Aurora Szentagotai and Serrano-Blanco, Antoni and Pagliari, Claudia and Wolters, Maria},
  volume = {},
  doi = {10.1016/j.jad.2012.07.001},
  title = {Activity monitoring in patients with depression: A systematic review.},
  url = {http://www.sciencedirect.com/science/article/pii/S0165032712005034},
  journal = {Journal of Affective Disorders},
  issn = {0165-0327},
  number = {0},
  pages = {-},
  note = {},
  year = {2012},
  abstract = {Background: Altered physical activity is an important feature of depression. It is manifested in psychomotor retardation, agitation and withdrawal from engagement in normal activities. Modern devices for activity monitoring (actigraphs) make it possible to monitor physical activity unobtrusively but the validity of actigraphy as an indicator of mood state is uncertain. We carried out a systematic review of digital actigraphy in patients with depression to investigate the associations between measured physical activity and depression. Methods: Systematic review and meta-analysis. Studies were identified from Medline, EMBASE and Psycinfo databases and included if they were either case control or longitudinal studies of actigraphy in adults aged between 18 and 65 diagnosed with a depressive disorder. Outcomes were daytime and night-time activity and actigraphic measures of sleep. Results: We identified 19 eligible papers from 16 studies (412 patients). Case control studies showed less daytime activity in patients with depression (standardised mean difference −0.76, 95% confidence intervals −1.05 to −0.47). Longitudinal studies showed moderate increase in daytime activity (0.53, 0.20 to 0.87) and a reduction in night-time activity (−0.36, −0.65 to −0.06) over the course of treatment. Limitations: All study participants were unblinded. Only seven papers included patients treated in the community. Conclusions: Actigraphy is a potentially valuable source of additional information about patients with depression. However, there are no clear guidelines for use of actigraphy in studies of patients with depression. Further studies should investigate patients treated in the community. Additional work to develop algorithms for differentiating behaviour patterns is also needed.},
  categories = {"Depressive disorder","Actigraphy", "Telemonitoring"}
}
@incollection{vipperla2009a,
  author = {Vipperla, Ravi Chander and Wolters, Maria and Georgila, Kallirroi and Renals, Steve},
  publisher = {Springer},
  doi = {10.1007/978-3-642-02710-9},
  title = {Speech Input from Older Users in Smart Environments: Challenges and Perspectives},
  url = {http://www.springerlink.com/content/27r01345r1683251/?p=ad2394d646814db59cf9868b0f74b11e&pi=13},
  series = {Lecture Notes in Computer Science},
  booktitle = {Proc. HCI International: Universal Access in Human-Computer Interaction. Intelligent and Ubiquitous Interaction Environments},
  number = {5615},
  year = {2009},
  pdf = {http://www.cstr.inf.ed.ac.uk/downloads/publications/2009/vipperla2009a.pdf},
  abstract = {Although older people are an important user group for smart environments, there has been relatively little work on adapting natural language interfaces to their requirements. In this paper, we focus on a particularly thorny problem: processing speech input from older users. Our experiments on the MATCH corpus show clearly that we need age-specific adaptation in order to recognize older users' speech reliably. Language models need to cover typical interaction patterns of older people, and acoustic models need to accommodate older voices. Further research is needed into intelligent adaptation techniques that will allow existing large, robust systems to be adapted with relatively small amounts of in-domain, age appropriate data. In addition, older users need to be supported with adequate strategies for handling speech recognition errors.}
}
@inproceedings{wolters-aaate:10,
  author = {Wolters, Maria and McGee-Lennon, Marilyn},
  pdf = {http://www.cstr.inf.ed.ac.uk/downloads/publications/2010/Wolters_McGee-Lennon_AAATE_Final.pdf},
  booktitle = {Proc. AAATE Workshop AT Technology Transfer, Sheffield, UK},
  title = {Designing Usable and Acceptable Reminders for the Home},
  abstract = {Electronic reminders can play a key role in enabling people to manage their care and remain independent in their own homes for longer. The MultiMemoHome project aims to develop reminder designs that are accessible and usable for users with a range of abilities and preferences. In an initial exploration of key design parameters, we surveyed 378 adults from all age groups online (N=206) and by post (N= 172). The wide spread of preferences that we found illustrates the importance of adapting reminder solutions to individuals. We present two reusable personas that emerged from the research and discuss how questionnaires can be used for technology transfer.},
  year = {2010}
}
@inproceedings{Wolters:2012:HTS:2212776.2223703,
  author = {Wolters, Maria and Isaac, Karl and Doherty, Jason},
  numpages = {6},
  publisher = {ACM},
  doi = {10.1145/2212776.2223703},
  isbn = {978-1-4503-1016-1},
  title = {Hold that thought: are spearcons less disruptive than spoken reminders?},
  url = {http://doi.acm.org/10.1145/2212776.2223703},
  series = {CHI EA '12},
  booktitle = {CHI '12 Extended Abstracts on Human Factors in Computing Systems},
  acmid = {2223703},
  location = {Austin, Texas, USA},
  year = {2012},
  keywords = {irrelevant speech effect, reminders, spearcon, speech, working memory},
  pages = {1745--1750},
  address = {New York, NY, USA}
}
@article{beaver:07,
  author = {Beaver, David and Clark, Brady Zack and Flemming, Edward and Jaeger, T. Florian and Wolters, Maria},
  title = {When Semantics meets Phonetics: {A}coustical studies of second occurrence focus},
  journal = {Language},
  number = {2},
  volume = {83},
  year = {2007},
  pdf = {http://www.cstr.inf.ed.ac.uk/downloads/publications/2007/BeaverLanguage2007.pdf},
  pages = {245--276}
}
@inproceedings{Wolters:optimi1,
  editor = {Garcia-Gomez, Juan Miguel and Paniagua-Paniagua, Patricia},
  author = {Wolters, Maria and Matheson, Colin},
  publisher = {Editorial Universitat Politecnica de Valencia},
  isbn = {978-84-8363-942-9},
  title = {Designing {Help4Mood}: Trade-Offs and Choices},
  booktitle = {Information and Communication Technologies applied to Mental Health},
  location = {Valencia, Spain},
  year = {2012},
  categories = {depression, eHealth}
}
@inproceedings{wolters-ssw:07,
  author = {Wolters, Maria and Campbell, Pauline and DePlacido, Christine and Liddell, Amy and Owens, David},
  title = {Making Synthetic Speech Accessible to Older People},
  booktitle = {Proc. Sixth ISCA Workshop on Speech Synthesis, Bonn, Germany},
  month = {August},
  year = {2007},
  pdf = {http://www.cstr.inf.ed.ac.uk/downloads/publications/2007/WoltersetalSSW2007.pdf},
  abstract = {In this paper, we report on an experiment that tested users' ability to understand the content of spoken auditory reminders. Users heard meeting reminders and medication reminders spoken in both a natural and a synthetic voice. Our results show that older users can understand synthetic speech as well as younger users provided that the prompt texts are well-designed, using familiar words and contextual cues. As soon as unfamiliar and complex words are introduced, users' hearing affects how well they can understand the synthetic voice, even if their hearing would pass common screening tests for speech synthesis experiments. Although hearing thresholds correlate best with users' performance, central auditory processing may also influence performance, especially when complex errors are made.},
  categories = {}
}
@inproceedings{Wolters:bhci,
  author = {Wolters, Maria and McCloughan, Lucy and Gibson, Martin and Weatherall, Chris and Matheson, Colin and Maloney, Tim and Castro-Robles, Juan Carlos and Estevez, Soraya},
  title = {Monitoring People with Depression in the Community---Regulatory Aspectts},
  booktitle = {Workshop on People, Computers and Psychiatry at the British Computer Society's Conference on Human Computer Interaction},
  location = {Birmingham, UK},
  year = {2012},
  pages = {1745--1750},
  categories = {depression, regulation, monitoring}
}
@inproceedings{wolters-interspeech:07,
  author = {Wolters, Maria and Campbell, Pauline and DePlacido, Christine and Liddell, Amy and Owens, David},
  title = {The Role of Outer Hair Cell Function in the Perception of Synthetic versus Natural Speech},
  booktitle = {Proc. Interspeech},
  month = {August},
  year = {2007},
  pdf = {http://www.cstr.inf.ed.ac.uk/downloads/publications/2007/WoltersetalInterspeech2007.pdf},
  abstract = {Hearing loss as assessed by pure-tone audiometry (PTA) is significantly correlated with the intelligibility of synthetic speech. However, PTA is a subjective audiological measure that assesses the entire auditory pathway and does not discriminate between the different afferent and efferent contributions. In this paper, we focus on one particular aspect of hearing that has been shown to correlate with hearing loss: outer hair cell (OHC) function. One role of OHCs is to increase sensitivity and frequency selectivity. This function of OHCs can be assessed quickly and objectively through otoacoustic emissions (OAE) testing, which is little known outside the field of audiology. We find that OHC function affects the perception of human speech, but not that of synthetic speech. This has important implications not just for audiological and electrophysiological research, but also for adapting speech synthesis to ageing ears.},
  categories = {}
}
@inproceedings{johnson-aas:09,
  author = {Johnson, Christine and Campbell, Pauline and DePlacido, Christine and Liddell, Amy and Wolters, Maria},
  title = {Does Peripheral Hearing Loss Affect {RGDT} Thresholds in Older Adults},
  booktitle = {Proceedings of the {A}merican {A}uditory {S}ociety {C}onference},
  month = {March},
  year = {2009},
  pdf = {http://www.cstr.inf.ed.ac.uk/downloads/publications/2009/aas09.pdf},
  abstract = {},
  categories = {speech synthesis, older users}
}
@article{wolters-uais:10,
  author = {Wolters, Maria and Engelbrecht, Klaus-Peter and G\"odde, Florian and M\"oller, Sebastian and Naumann, Anja and Schleicher, Robert},
  doi = {10.1007/s10209-009-0184-x},
  title = {Making it Easier for Older People to Talk to Smart Homes: Using Help Prompts to Shape Users' Speech},
  journal = {Universal Access in the Information Society},
  number = {4},
  pages = {311-325},
  volume = {9},
  year = {2010},
  abstract = {It is well known that help prompts shape how users talk to spoken dialogue systems. This study investigated the effect of help prompt placement on older users' interaction with a smart home interface. In the dynamic help condition, help was only given in response to system errors; in the inherent help condition, it was also given at the start of each task. Fifteen older and sixteen younger users interacted with a smart home system using two different scenarios. Each scenario consisted of several tasks. The linguistic style users employed to communicate with the system (interaction style) was measured using the ratio of commands to the overall utterance length (keyword ratio) and the percentage of content words in the user's utterance that could be understood by the system (shared vocabulary). While the timing of help prompts did not affect the interaction style of younger users, it was early task-specific help supported older users in adapting their interaction style to the system's capabilities. Well-placed help prompts can significantly increase the usability of spoken dialogue systems for older people.},
  categories = {spoken dialogue systems, usability, older adults, smart homes, help prompts}
}
@inproceedings{wolters-is:09,
  author = {Wolters, Maria and Vipperla, Ravichander and Renals, Steve},
  title = {Age Recognition for Spoken Dialogue Systems: Do We Need It?},
  booktitle = {Proc. Interspeech},
  month = {September},
  year = {2009},
  pdf = {http://www.cstr.inf.ed.ac.uk/downloads/publications/2009/is09.pdf},
  abstract = {When deciding whether to adapt relevant aspects of the system to the particular needs of older users, spoken dialogue systems often rely on automatic detection of chronological age. In this paper, we show that vocal ageing as measured by acoustic features is an unreliable indicator of the need for adaptation. Simple lexical features greatly improve the prediction of both relevant aspects of cognition and interactions style. Lexical features also boost age group prediction. We suggest that adaptation should be based on observed behaviour, not on chronological age, unless it is not feasible to build classifiers for relevant adaptation decisions.},
  categories = {age recognition, spoken dialogue systems}
}
@inproceedings{Wolters:cyber17,
  author = {Pagliari, Claudia and Wolters, Maria and Burton, Chris and McKinstry, Brian and Szentagotai, Aurora and Serrano-Blanco, Antoni and David, Daniel and Ferrini, Luis and Albertini, Susanna and Castro, Joan Carlos and Estévez, Soraya},
  booktitle = {CYBER17-17th Annual CyberPsychology & CyberTherapy Conference},
  title = {Psychosocial Implications of Avatar Use in Supporting Therapy of Depression},
  location = {Brussels, Belgium},
  categories = {depression, cybertherapy, monitoring},
  year = {2012}
}
@inproceedings{georgila:08,
  author = {Georgila, Kallirroi and Wolters, Maria and Karaiskos, Vasilis and Kronenthal, Melissa and Logie, Robert and Mayo, Neil and Moore, Johanna and Watson, Matt},
  booktitle = {Proceedings of the 6th International Conference on Language Resources and Evaluation},
  title = {A Fully Annotated Corpus for Studying the Effect of Cognitive Ageing on Users' Interactions with Spoken Dialogue Systems},
  year = {2008}
}
@article{wolters-taccess:09,
  author = {Wolters, Maria and Georgila, Kallirroi and MacPherson, Sarah and Moore, Johanna},
  title = {Being Old Doesn't Mean Acting Old: Older Users' Interaction with Spoken Dialogue Systems},
  journal = {ACM Transactions on Accessible Computing},
  number = {1},
  pages = {1--39},
  volume = {2},
  year = {2009},
  pdf = {http://www.cstr.inf.ed.ac.uk/downloads/publications/2009/citation.cfm},
  abstract = {Most studies on adapting voice interfaces to older users work top-down by comparing the interaction behavior of older and younger users. In contrast, we present a bottom-up approach. A statistical cluster analysis of 447 appointment scheduling dialogs between 50 older and younger users and 9 simulated spoken dialog systems revealed two main user groups, a “social” group and a “factual” group. “Factual” users adapted quickly to the systems and interacted efficiently with them. “Social” users, on the other hand, were more likely to treat the system like a human, and did not adapt their interaction style. While almost all “social” users were older, over a third of all older users belonged in the “factual” group. Cognitive abilities and gender did not predict group membership. We conclude that spoken dialog systems should adapt to users based on observed behavior, not on age.},
  categories = {spoken dialogue systems, older users, human-computer interaction}
}
@inproceedings{owens-efas:07,
  author = {Owens, David and Campbell, Pauline and Liddell, Amy and DePlacido, Christine and Wolters, Maria},
  title = {Random Gap Detection Threshold: A Useful Measure of Auditory Ageing?},
  booktitle = {Proc. Europ. Cong. Fed. Audiol. Heidelberg, Germany},
  month = {June},
  year = {2007},
  pdf = {http://www.cstr.inf.ed.ac.uk/downloads/publications/2007/Owensetal2007EFAS.pdf},
  abstract = {},
  categories = {}
}
@inproceedings{wolters2010,
  author = {Wolters, Maria K. and Isaac, Karl B. and Renals, Steve},
  title = {Evaluating speech synthesis intelligibility using {Amazon Mechanical Turk}},
  booktitle = {Proc. 7th Speech Synthesis Workshop (SSW7)},
  abstract = {Microtask platforms such as Amazon Mechanical Turk (AMT) are increasingly used to create speech and language resources. AMT in particular allows researchers to quickly recruit a large number of fairly demographically diverse participants. In this study, we investigated whether AMT can be used for comparing the intelligibility of speech synthesis systems. We conducted two experiments in the lab and via AMT, one comparing US English diphone to US English speaker-adaptive HTS synthesis and one comparing UK English unit selection to UK English speaker-dependent HTS synthesis. While AMT word error rates were worse than lab error rates, AMT results were more sensitive to relative differences between systems. This is mainly due to the larger number of listeners. Boxplots and multilevel modelling allowed us to identify listeners who performed particularly badly, while thresholding was sufficient to eliminate rogue workers. We conclude that AMT is a viable platform for synthetic speech intelligibility comparisons.},
  year = {2010},
  pdf = {http://www.cstr.inf.ed.ac.uk/downloads/publications/2010/wolters-ssw2010.pdf},
  pages = {136--141},
  categories = {intelligibility, evaluation, semantically unpredictable sentences, diphone, unit selection, crowd- sourcing, Mechanical Turk, HMM-based synthesis}
}
@inproceedings{Wolters2011,
  author = {Wolters, Maria Klara and Johnson, Christine and Isaac, Karl B},
  title = {Can the Hearing Handicap Inventory for Adults Be Used As a Screen for Perception Experiments?},
  booktitle = {Proc. ICPhS XVII},
  address = {Hong Kong},
  year = {2011},
  pdf = {http://www.cstr.inf.ed.ac.uk/downloads/publications/2011/Wolters_icphs.pdf},
  abstract = {When screening participants for speech perception experiments, formal audiometric screens are often not an option, especially when studies are conducted over the Internet. We investigated whether a brief standardized self-report questionnaire, the screening version of the Hearing Handicap Inventory for Adults (HHIA-S), could be used to approximate the results of audiometric screening. Our results suggest that while the HHIA-S is useful, it needs to be used with extremely strict cut-off values that could exclude around 25\% of people with no hearing impairment who are interested in participating. Well constructed, standardized single questions might be a more feasible alternative, in particular for web experiments.},
  categories = {audiometry,hearing handicap inventory,screening}
}
@inproceedings{wolters-itg:08,
  author = {Wolters, Maria and Campbell, Pauline and DePlacido, Christine and Liddell, Amy and Owens, David},
  title = {Adapting {S}peech {S}ynthesis {S}ystems to {U}sers with {A}ge-{R}elated {H}earing {L}oss},
  url = {http://homepages.inf.ed.ac.uk/mwolters/itg08.pdf},
  booktitle = {Beitr{\"a}ge der 8. {ITG} {F}achtagung {S}prachkommunikation},
  month = {September},
  year = {2008},
  abstract = {This paper summarises the main results of a pilot study into the effect of auditory ageing on the intelligibility of synthetic speech. 32 older and 12 younger users had to answer simple questions about a series of meeting reminders and medication reminders. They also underwent an extensive battery of audiological and cognitive assessments. Older users only had more difficulty understanding the synthetic voice than younger people if they had elevated pure-tone thresholds and if they were asked to unfamiliar medication names. We suggest that these problems can be remedied by better prompt design. User interviews show that the synthetic voice used was quite natural. Problems mentioned by users fit the results of a previous error analysis.},
  categories = {speech synthesis, older users}
}
@inproceedings{Wolters:medetel,
  author = {Wolters, Maria and Ferrini, Louis and Martinez-Miranda, Juan and Hastie, Helen and Burton, Chris},
  publisher = {International Society for Telemedicine & eHealth (ISfTeH)},
  title = {{Help4Mood} - A Flexible Solution for Supporting People with Depression in the Community across Europe},
  booktitle = {Proceedings of The International eHealth, Telemedicine and Health ICT Forum For Education, Networking and Business (MedeTel, 2012)},
  editors = {Jodanova, E and Lievens, F},
  location = {Luxemburg},
  year = {2012},
  categories = {depression, mental health, ehealth}
}
@inproceedings{georgila-sigdial:10,
  author = {Georgila, Kallirroi and Wolters, Maria and Moore, Johanna D.},
  pdf = {http://www.cstr.inf.ed.ac.uk/downloads/publications/2010/sigdial_final.pdf},
  booktitle = {Proc. SIGDIAL},
  title = {Learning Dialogue Strategies from Older and Younger Simulated Users},
  abstract = {Older adults are a challenging user group because their behaviour can be highly variable. To the best of our knowledge, this is the first study where dialogue strategies are learned and evaluated with both simulated younger users and simulated older users. The simulated users were derived from a corpus of interactions with a strict system-initiative spoken dialogue system (SDS). Learning from simulated younger users leads to a policy which is close to one of the dialogue strategies of the underlying SDS, while the simulated older users allow us to learn more flexible dialogue strategies that accommodate mixed initiative. We conclude that simulated users are a useful technique for modelling the behaviour of new user groups.},
  year = {2010}
}
@inproceedings{liddell-efas:07,
  author = {Liddell, Amy and Owens, David and Campbell, Pauline and DePlacido, Christine and Wolters, Maria},
  title = {Can Extended High Frequency Hearing Thresholds be Used to Detect Auditory Processing Difficulties in an Ageing Population?},
  booktitle = {Proc. Europ. Cong. Fed. Audiol. Heidelberg, Germany},
  month = {June},
  year = {2007},
  abstract = {},
  categories = {}
}
@article{wolters-iwc:09,
  author = {Wolters, Maria and Georgila, Kallirroi and Logie, Robert and MacPherson, Sarah and Moore, Johanna and Watson, Matt},
  title = {Reducing Working Memory Load in Spoken Dialogue Systems},
  journal = {Interacting with Computers},
  number = {4},
  pages = {276-287},
  volume = {21},
  year = {2009},
  pdf = {http://www.cstr.inf.ed.ac.uk/downloads/publications/2009/iwc09.pdf},
  abstract = {We evaluated two strategies for alleviating working memory load for users of voice interfaces: presenting fewer options per turn and providing confirmations. Forty-eight users booked appointments using nine different dialogue systems, which varied in the number of options presented and the confirmation strategy used. Participants also performed four cognitive tests and rated the usability of each dialogue system on a standardised questionnaire. When systems presented more options per turn and avoided explicit confirmation subdialogues, both older and younger users booked appointments more quickly without compromising task success. Users with lower information processing speed were less likely to remember all relevant aspects of the appointment. Working memory span did not affect appointment recall. Older users were slightly less satisfied with the dialogue systems than younger users. We conclude that the number of options is less important than an accurate assessment of the actual cognitive demands of the task at hand.},
  categories = {spoken dialogue; ageing; older adults; cognitive aging; working memory}
}
@inproceedings{mcgeelennon-icad:07,
  author = {McGee-Lennon, Marilyn and Wolters, Maria and McBryan, Tony},
  title = {Auditory Reminders in the Home},
  booktitle = {Proc. Intl. Conf. Auditory Display (ICAD), Montreal, Canada},
  month = {June},
  year = {2007},
  abstract = {},
  categories = {}
}
@inproceedings{moeller:08,
  author = {M\"oller, Sebastian and G\"odde, Florian and Wolters, Maria},
  booktitle = {Proceedings of the 6th International Conference on Language Resources and Evaluation},
  title = {A Corpus Analysis of Spoken Smart-Home Interactions with Older Users},
  year = {2008}
}
@article{georgila-lrec:10,
  author = {Georgila, Kallirroi and Wolters, Maria and Moore, Johanna D. and Logie, Robert H.},
  doi = {10.1007/s10579-010-9118-8},
  title = {The {MATCH} Corpus: A Corpus of Older and Younger Users' Interactions with Spoken Dialogue Systems.},
  journal = {Language Resources and Evaluation},
  number = {3},
  month = {March},
  volume = {44},
  pages = {221--261},
  year = {2010},
  keywords = {Spoken dialogue corpora, Spoken dialogue systems, Cognitive ageing, Annotation, Information states, Speech acts, User simulations, Speech recognition},
  abstract = {We present the MATCH corpus, a unique data set of 447 dialogues in which 26 older and 24 younger adults interact with nine different spoken dialogue systems. The systems varied in the number of options presented and the confirmation strategy used. The corpus also contains information about the users' cognitive abilities and detailed usability assessments of each dialogue system. The corpus, which was collected using a Wizard-of-Oz methodology, has been fully transcribed and annotated with dialogue acts and ``Information State Update'' (ISU) representations of dialogue context. Dialogue act and ISU annotations were performed semi-automatically. In addition to describing the corpus collection and annotation, we present a quantitative analysis of the interaction behaviour of older and younger users and discuss further applications of the corpus. We expect that the corpus will provide a key resource for modelling older people's interaction with spoken dialogue systems.}
}
@inproceedings{wolters-pqs:10,
  author = {Wolters, Maria K. and G\"odde, Florian and M\"oller, Sebastian and Engelbrecht, Klaus-Peter},
  pdf = {http://www.cstr.inf.ed.ac.uk/downloads/publications/2010/Wolters_et_al_PQS.pdf},
  booktitle = {Proc. ISCA Workshop Perceptual Quality of Speech Systems, Dresden, Germany},
  title = {Finding Patterns in User Quality Judgements},
  abstract = {User quality judgements can show a bewildering amount of variation that is diffcult to capture using traditional quality prediction approaches. Using clustering, an ex- ploratory statistical analysis technique, we reanalysed the data set of a Wizard-of-Oz experiment where 25 users were asked to rate the dialogue after each turn. The sparse data problem was addressed by careful a priori parameter choices and comparison of the results of different cluster algorithms. We found two distinct classes of users, positive and critical. Positive users were generally happy with the dialogue system, and did not mind errors. Critical users downgraded their opinion of the system after errors, used a wider range of ratings, and were less likely to rate the system positively overall. These user groups could not be predicted by experience with spoken dialogue systems, attitude to spoken dialogue systems, anity with technology, demographics, or short-term memory capacity. We suggest that evaluation research should focus on critical users and discuss how these might be identified.},
  year = {2010}
}
@inproceedings{morgan:08,
  author = {Morgan, Maggie and McGee-Lennon, Marilyn R. and Hine, Nick and Arnott, John and Martin, Chris and Clark, Julia S. and Wolters, Maria},
  booktitle = {Proc. 26th Conference on Computer-Human Interaction, Florence},
  title = {Requirements Gathering with Diverse User Groups and Stakeholders},
  year = {2008}
}
@inproceedings{Wolters:medetel-castro,
  author = {Estevez, Soraya and Castro-Robles, Juan Carlos and Wolters, Maria},
  publisher = {International Society for Telemedicine & eHealth (ISfTeH)},
  title = {{Help4Mood}: First Release of a Computational Distributed System to Support the Treatment of Patients with Major Depression},
  booktitle = {Proceedings of The International eHealth, Telemedicine and Health ICT Forum For Education, Networking and Business (MedeTel, 2012)},
  editors = {Jodanova, E and Lievens, F},
  location = {Luxemburg},
  year = {2012},
  pages = {1745--1750},
  categories = {depression, mental health, ehealth}
}
@article{winterboer-csl:11,
  author = {Winterboer, Andi K. and Tietze, Martin I. and Wolters, Maria K. and Moore, Johanna D.},
  title = {The user-model based summarize and refine approach improves information presentation in spoken dialog systems},
  journal = {Computer Speech and Language},
  number = {2},
  pages = {175-191},
  volume = {25},
  year = {2011},
  pdf = {http://www.cstr.inf.ed.ac.uk/downloads/publications/2011/CSL10.pdf},
  abstract = {A common task for spoken dialog systems (SDS) is to help users select a suitable option (e.g., flight, hotel, and restaurant) from the set of options available. As the number of options increases, the system must have strategies for generating summaries that enable the user to browse the option space efficiently and successfully. In the user-model based summarize and refine approach (UMSR, Demberg and Moore, 2006), options are clustered to maximize utility with respect to a user model, and linguistic devices such as discourse cues and adverbials are used to highlight the trade-offs among the presented items. In a Wizard-of-Oz experiment, we show that the UMSR approach leads to improvements in task success, efficiency, and user satisfaction compared to an approach that clusters the available options to maximize coverage of the domain (Polifroni et al., 2003). In both a laboratory experiment and a web-based experimental paradigm employing the Amazon Mechanical Turk platform, we show that the discourse cues in UMSR summaries help users compare different options and choose between options, even though they do not improve verbatim recall. This effect was observed for both written and spoken stimuli.}
}
@inproceedings{Wolters:mindcare,
  author = {Wolters, Maria and Martínez-Miranda, Juan and Hastie, Helen and Matheson, Colin},
  booktitle = {The 2nd International Workshop on Computing Paradigms for Mental Health - MindCare 2012},
  title = {Managing Data in {Help4Mood}},
  location = {Vilamoura, Portugal},
  categories = {irrelevant speech effect, reminders, spearcon, speech, working memory},
  year = {2012}
}
@inproceedings{penner-icphs:07,
  author = {Penner, Heike and Miller, Nicholas and Wolters, Maria},
  booktitle = {Proc. Intl. Conf. Phon. Sci,},
  title = {Motor Speech Disorders in Three {P}arkinsonian Syndromes: A Comparative Study},
  abstract = {},
  categories = {},
  year = {2007}
}
@inproceedings{Wolters2014,
  author = {Wolters, Maria K.},
  publisher = {ACM Press},
  doi = {10.1145/2559206.2578878},
  isbn = {9781450324748},
  title = {{The minimal effective dose of reminder technology}},
  url = {http://dl.acm.org/citation.cfm?id=2559206.2578878},
  abstract = {Remembering to take one's medication on time is hard work. This is true for younger people with no chronic illness as well as older people with many co-morbid conditions that require a complex medication regime. Many technological solutions have been proposed to help with this problem, but is more IT really the solution? In this paper, I argue that technological help should be limited to the minimal effective dose, which depends on the person and their living situation, and may well be zero.},
  year = {2014},
  month = {April},
  pages = {771--780},
  address = {New York, New York, USA},
  keywords = {alerts,ehealth,medication,reminders,telecare},
  booktitle = {Proceedings of the extended abstracts of the 32nd annual ACM conference on Human factors in computing systems - CHI EA '14}
}
@inproceedings{Wolters2014a,
  author = {Wolters, Maria K. and Niven, Elaine and Logie, Robert H.},
  publisher = {ACM Press},
  doi = {10.1145/2559206.2581287},
  isbn = {9781450324748},
  title = {{The art of deleting snapshots}},
  url = {http://dl.acm.org/citation.cfm?id=2559206.2581287},
  abstract = {In this paper, we investigate why people decide to delete snapshots. 74 participants took snapshots of a street festival every three minutes for an hour and were then asked to cull pictures immediately or after a delay of a day, a week, or a month. We found that the ratio of kept to deleted pictures was fairly constant. Deletion criteria fell into six main categories that mostly involved subjective assessments such as whether a photo was sufficiently characteristic. We conclude that automatic tagging of photos for deletion is problematic; interfaces should instead make it easy for users to find and compare similar photos.},
  year = {2014},
  month = {April},
  pages = {2521--2526},
  address = {New York, New York, USA},
  keywords = {forgetting,photowork,preservation},
  booktitle = {Proceedings of the extended abstracts of the 32nd annual ACM conference on Human factors in computing systems - CHI EA '14}
}