Joshua J. Guyer, Ph.D.

Department of Psychology
Psychology

Education

Postdoctoral Research Fellow, Universidad Autónoma de Madrid, Social Psychology
Doctor of Philosophy, Queen's University, Social-Personality Psychology
Master of Science, Queen's University, Social-Personality Psychology
Bachelor of Arts (Honors), Kwantlen Polytechnic University, Psychology

Research Interests

Attitudes & Persuasion
Social Influence
Nonverbal Behavior

Publications and Media Placements

Vaughan-Johnston, T. I., Guyer, J. J., Fabrigar, L. R., Lamprinakos, G., & Briñol, P. (In Press). Falling Vocal Intonation Signals Speaker Confidence and can both Help and Hinder Persuasion. Personality and Social Psychology Bulletin.

Horcajo, J., Santos, D., Gil, R., & Guyer, J. J. (2024). Changing attitudes in favor of a pro-environmental proposal from a minority group: The self-validating role of ingroup versus outgroup sources. Psicothema, 36 (1), 46-54. https://doi.org/10.7334/psicothema2022.502

Guyer, J. J., Briñol, P., Vaughan-Johnston, T. I., Fabrigar, L. R., Moreno, L., & Petty, R. E. (2023). Pitch as a Recipient, Channel, and Context Factor Affecting Thought Reliance and Attitudes: A Self-Validation Analysis. Personality and Social Psychology Bulletin, 0 (0), 1-16. https://doi.org/10.1177/01461672231197547

Nguyen, A., Guyer, J. J., & Fabrigar, L. R. (2021). The influence of confession specificity and issue intensity on the efficacy of stealing thunder. Journal of Experimental Social Psychology, 97. https://doi.org/10.1016/j.jesp.2021.104218

Guyer, J. J., Briñol, P., Vaughan-Johnston, T. I., Fabrigar, L. R., Moreno, L., & Petty, R. E. (2021). Paralinguistic features communicated through voice can affect appraisals of confidence and evaluative judgments, Journal of Nonverbal Behavior, 45, 479-504. https://doi.org/10.1007/s10919-021-00374-2

Vaughan-Johnston, T.L., Guyer, J. J., & Fabrigar, L. R., & Chen, M. (2021). The role of vocal affect in persuasion: The CIVA model, Journal of Nonverbal Behavior, 45, 455-477. https://doi.org/10.1007/s10919-021-00373-3

Horcajo, J., Santos, D., & Guyer, J. J., & Mateos, R. (2020). A meta-cognitive approach to attitude change regarding doping in sports. Journal of Sports Science, 38 (19), 2242-2252. https://doi.org/10.1080/02640414.2020.1776930

Paredes, B., Guyer, J. J., Briñol, P., & Petty, R. E. (2019). Subtle priming of subtraction vs. addition: A Spill-Over Effect of Math/La inducción sutil de sumar vs. restar: un efecto indirecto de las matemáticas. International Journal of Social Psychology, 34, 590-622. https://doi.org/10.1080/02134748.2019.1649890

Horcajo, J., Santos, D., Guyer, J. J., & Moreno, L. (2019). Changing attitudes and intentions related to doping: An analysis of individual differences in Need for Cognition. Journal of Sports Science, 37 (24), 2835-2843. https://doi.org/10.1080/02640414.2019.1665876

Guyer, J. J., Briñol, P., Petty, R. E., & Horcajo, J. (2019). Non-verbal behavior of persuasive sources: A Multiple process analysis. Journal of Nonverbal Behavior, 43, 203-231. https://psycnet.apa.org/doi/10.1007/s10919-018-00291-x

Guyer, J. J., Fabrigar, L. R., & Vaughan-Johnston, T. I. (2018). Speech rate, intonation, and pitch: Investigating the bias and cue effects of vocal confidence on persuasion. Personality and Social Psychology Bulletin, 45 (3), 389-405. https://doi.org/10.1177/0146167218787805

Letamendia, L. N., Silva, A. C., & Guyer, J. J. (2018). Financial illiteracy, motivations and barriers to saving and investing by Spanish households. Funcas Social and Economic Studies, 4, 77-97. https://ssrn.com/abstract=3302207

Guyer, J. J., Fabrigar, L. R., Vaughan-Johnston, T. I., & Tang, C. (2017). The counter-intuitive influence of vocal affect on the efficacy of affectively-based persuasive messages. Journal of Experimental Social Psychology, 74, 161-173. https://doi.org/10.1016/j.jesp.2017.09.005

Book Chapters

Horcajo, J., & Guyer, J. J. (In Press). The role of self-talk and nonverbal behavior in the context of sports. Handbook of Self-Talk. American Psychological Association, PsycBooks.

Vaughan-Johnston, T. I., Guyer, J. J., & Fabrigar, L. R. (2022). Persuasion and Social Change. Routledge. https://doi.org/10.4324/9780367198459-REPRW116-1

Guyer, J. J., Vaughan-Johnston, T. I., & Nguyen, A. (2022). Stealing Thunder: Empirical Evidence and Real-World Applications. Routledge. https://doi.org/10.4324/9780367198459-REPRW115-1

Briñol, P., Petty, R. E., & Guyer, J. J. (2019). A Historical view on attitudes and persuasion. In Hegarty, P., Logan, C., Long, W., Pettikainen, P., Rutherford, & Rickren, W. E. (Eds.), Oxford Encyclopedia of the History of Psychology. New York, NY: Oxford University Press. https://doi.org/10.1093/acrefore/9780190236557.013.510

Guyer, J. J., & Vaughan-Johnston, T. I. (2018). Upward and downward social comparisons: A brief historical overview. In: Zeigler-Hill V., Shackelford T. (Eds.) Encyclopedia of Personality and Individual Differences, Springer, Cham. https://doi.org/10.1007/978-3-319-24612-3_1912

Guyer, J. J., & Fabrigar, L. R. (2015). The attitude-behavior link: A review of the history. In J. Wright & J. Berry (Eds.), International Encyclopedia of Social and Behavioral Sciences (2nd ed., Vol. 2, pp. 183-189). Elsevier. http://dx.doi.org/10.1016/B978-0-08-097086-8.24007-5

Invited Articles in Professional Association Journals

Guyer, J. J. (Feb. 2022). So you want to be persuasive? Start by sounding confident. Society for Personality and Social Psychology, Character & Context. https://www.spsp.org/news-center/blog/guyer-voice-confidence-persuasiveness

Guyer, J. J. (April 2016). The influence of vocally expressed emotions on attitude change. Canadian Psychological Association, Mind Pad, 4 (2), 21-25. https://cpa.ca/docs/File/Students/MindPad/mindpadspring2016

Guyer, J. J. (Feb. 2016). What you say matters but so does how you say it. Association for Psychological Science Student Observer Notebook, 29 (2). https://www.psychologicalscience.org/observer/what-you-say-matters

Conference Presentations: Papers

Patro, G. A., Fabrigar, L. R., Kan, M., & Guyer, J. J. (April 2024). The multiple roles of scarcity as a compliance strategy. Paper presented at the Midwestern Psychological Association conference, in Chicago, Illinois, USA.

Pham, C., Fabrigar, L. R., Guyer, J. J., & Nguyen, A. (April 2024). The influence of confession specificity. Paper presented at the Midwestern Psychological Association conference, in Chicago, Illinois, USA.

Shen, M., Fabrigar, L. R., Guyer, J. J., & Vaughan-Johnston, T.I. (April 2024). The effects of vocal speed on information processing and persuasion. Paper presented at the Midwestern Psychological Association conference, in Chicago, Illinois, USA.

Paredes, B., Briñol, P., Santos, D., Guyer, J. J., Moreno, L., & Petty, R. (April 2023). Attitudes and perceived knowledge guiding behavior: The moderating role of hedonic mindset. Paper presented at the Midwestern Psychological Association conference, in Chicago, Illinois, USA.

Guyer, J. J., Briñol, P., Vaughan-Johnston, T. I., Fabrigar, L. R., Moreno, L., Vidal, L., & Petty, R. E. (Jan. 2022). The metacognitive influence of pitch on attitudes as a recipient, channel and context factor. Paper presented at the Lisbon-Madrid Meeting for Attitudes and Persuasion, in Lisbon, Portugal.

Vaughan-Johnston, T. I., Guyer, J. J., Fabrigar, L. R., Briñol, P., & Petty, R. (April 2021). Vocal confidence increases persuasion more when relevant as an argument. Paper presented at the Midwestern Psychological Association conference, in Chicago, Illinois, USA.

Guyer, J. J., Briñol, P., Vaughan-Johnston, T. I., Fabrigar, L. R., Vidal, L., Moreno, L., & Petty, R. E. (Oct. 2020). Who said what to whom? Unpacking the metacognitive influence of pitch on persuasion. Paper presented at the Sociedad Científica Española de Psicología Social conference, in Burgos, Spain.

Guyer, J. J., Briñol, P., Vaughan-Johnston, T. I., Fabrigar, L. R., Vidal, L., Moreno, L., & Petty, R. E. (June 2020). The metacognitive benefits of pitch on persuasion as a source, recipient, and context factor. Paper accepted at the European Association of Social Psychology conference; The Psychology of Attitudes: Social Processes of Evaluation, in Bath, UK. (Conference canceled).

Vaughan-Johnston, T. I., Guyer, J. J., Fabrigar, L. R., & Briñol, P. (April 2020). Vocal confidence can increase persuasion as an argument. Paper accepted at the Midwestern Psychological Association conference, in Chicago, Illinois, USA. (Conference canceled).

Guyer, J. J., Briñol, P., Vaughan-Johnston, T. I., Fabrigar, L. R., Petty, R. E., & Vidal, L. (April 2020). The metacognitive role of vocal confidence in persuasion. Paper accepted at the Midwestern Psychological Association conference, in Chicago, Illinois, USA. (Conference canceled).

Guyer, J. J., Horcajo, J., Santos, D., & Mateos, R. (April 2020). A metacognitive approach to attitude change regarding doping in sports. Paper accepted at the Midwestern Psychological Association conference, in Chicago, Illinois, USA (Conference canceled).

Nguyen, A., Guyer, J. J., & Fabrigar, L. R. (April 2020). Stealing thunder boundary conditions: issue severity and confession specificity. Paper accepted at the Midwestern Psychological Association conference, in Chicago, Illinois, USA. (Conference canceled).

Fabrigar, L. R., Guyer, J. J., Vaughan-Johnston, T. I., Briñol, P., & Petty, R. E. (Feb. 2020). Vocal Confidence and Persuasion: An ELM Perspective. Paper presented at the Attitudes preconference at the Society for Personality and Social Psychology conference, New Orleans, Louisiana, USA.

Guyer, J. J., Briñol, P., Petty, R. E., Vidal, L., & Jeffs-Benavente, J. (Feb. 2020). The Role of Vocal Confidence in Persuasion: A Self-Validation Perspective. Paper presented at the Society for Personality and Social Psychology conference, in New Orleans, Louisiana, USA.

Paredes, B., Santos, D., Guyer, J. J., Briñol, P., & Petty, R. (June 2019). Decisions about job candidates in personal selection settings: The importance of objective and subjective knowledge. Paper presented at the Risk, Uncertainty, and Decisions meeting, in Madrid, Spain.

Guyer, J. J., Fabrigar, L. R., & Vaughan-Johnston, T. I. (April 2019). Speaker confidence differentially influences persuasion based on high/low thinking. Paper presented at the Midwestern Psychological Association conference, in Chicago, Illinois, USA.

Guyer, J. J., Horcajo, J., Santos, D., & Moreno, L. (April 2019). Need for cognition moderates attitude-intention correspondence toward doping. Paper presented at the Midwestern Psychological Association conference, in Chicago, Illinois, USA.

Paredes, B., Briñol, P., Santos, D., Guyer, J. J., Gandarillas, B., & Petty, R. (April 2019). The effect of amount of knowledge on attitudes and attitude strength in a personal selection setting. Paper presented at the Midwestern Psychological Association conference, in Chicago, Illinois, USA.

Vaughan-Johnston, T. I., Guyer, J. J., & Fabrigar, L. R. (April 2019). Investigating how the interplay between vocal affect and cognitive messages influences persuasion. Paper presented at the Midwestern Psychological Association conference, in Chicago, Illinois, USA.

Guyer, J. J., Fabrigar, L. R., & Vaughan-Johnston, T. I. (Nov. 2018). Vocal pitch and persuasion: Investigating the bias and cue effects of vocal confidence. Paper presented at the Lisbon-Madrid Meeting for Attitudes and Persuasion, in Lisbon, Portugal.

Paredes, B., Guyer, J. J., Briñol, P., & Petty, R. E. (Oct. 2018). Corrección del Sesgo Inducida Sutilmente: Revirtiendo el Efecto de la Credibilidad de la Fuente sobre las Actitudes. Paper presented at the Sociedad Científica Española de Psicología Social conference, in Cuenca, Spain.

Guyer, J. J., Fabrigar, L. R., & Vaughan-Johnston, T. I. (July 2018). Vocal confidence and persuasion: How speech rate affects amount of processing as a function of recipient ability and motivation. Paper presented at the Ohio State University Attitudes conference, in Columbus, Ohio, USA.

Guyer, J. J., Fabrigar, L. R., & Nguyen, A. (April 2018). The influence of confession specificity on the efficacy of stealing thunder. Paper presented at the Midwestern Psychological Association conference, in Chicago, Illinois, USA.

Guyer, J. J., Vaughan-Johnston, T. I., & Jain, S. (April 2018). Perceived similarity between objects influences perceptions of scarcity and beyond. Paper presented at the Midwestern Psychological Association conference, in Chicago, Illinois, USA.

Paredes, B., Guyer, J. J., Briñol, P., Petty, R. E. (April 2018). The impact of math primes on persuasion: Correcting the effects of source credibility on attitudes. Paper presented at the Midwestern Psychological Association conference, in Chicago, Illinois, USA.

Guyer, J. J., & Fabrigar, L. R. (April 2017). The effects of affective voice-content congruency on persuasion. Paper presented at the Western Psychological Association conference, in Sacramento, California, USA.

Guyer, J. J., & Fabrigar, L. R. (March 2017). The influence of confession specificity on the efficacy of stealing thunder in a political context. Paper presented at the Southwestern Psychological Association conference, in San Antonio, Texas, USA.

Guyer, J. J., & Fabrigar, L. R. (March 2017). Vocal confidence and persuasion: Speech rate affects amount of processing under moderate elaboration. Paper presented at the Eastern Psychological Association conference, in Boston, Massachusetts, USA.

Guyer, J. J., & Fabrigar, L. R. (Nov. 2016). Investigating the multiple roles of vocal pitch in persuasion. Paper presented at the Society of Southeastern Social Psychologists conference, in Asheville, North Carolina, USA.

Guyer, J. J., & Fabrigar, L. R. (May 2016). The influence of speech rate and intonation on persuasion: Multiple roles of vocal confidence. Paper presented at the Midwestern Psychological Association conference, in Chicago, Illinois, USA.

Conference Presentations: Posters

Guyer, J. J., Vaughan-Johnston, T. I., Fabrigar, L. R., Briñol, P., & Petty, R. (Feb. 2021). Vocal confidence can increase and decrease persuasion. Poster presented at the Society for Personality and Social Psychology conference, (Held Online).

Vaughan-Johnston, T. I., Guyer, J. J., Glatt, K., & Fabrigar, L. R. (Feb. 2020). Framing bolsters the reputational benefits of stealing thunder. Poster presented at the Attitude pre-conference at the Society for Personality and Social Psychology conference, in New Orleans, Louisiana, USA.

Guyer, J. J., Horcajo, J., Santos, D., & Mateos, R. (Feb. 2020). A meta-cognitive approach to attitude change regarding doping in sports. Poster presented at the Society for Personality and Social Psychology conference, in New Orleans, Louisiana, USA.

Nguyen, A., Guyer, J. J. Fabrigar, L. R. (Feb. 2019). The benefits of stealing thunder across transgression intensity and confession specificity. Poster presented at the Attitude pre-conference at the Society for Personality and Social Psychology conference, in Portland, Oregon, USA.

Guyer, J. J. Fabrigar, L. R., & Vaughan-Johnston, T. I. (Feb. 2019). Vocal pitch and persuasion: Investigating the bias and cue effects of vocal confidence. Poster presented at the Society for Personality and Social Psychology conference, in Portland, Oregon, USA.

Paredes, B., Guyer, J. J., Briñol, P., & Petty, R. E. (March 2018). The role of subtle primes in bias correction: Reversing the effects of source credibility on attitudes. Poster presented at the Attitude pre-conference at the Society for Personality and Social Psychology conference, in Atlanta, Georgia, USA.

Guyer, J. J., Vaughan-Johnston, T. I., & Fabrigar, L. R. (March 2018). Vocal intonation can influence persuasion by moderating the amount of thinking. Poster presented at the Attitude pre-conference at the Society for Personality and Social Psychology conference, in Atlanta, Georgia, USA.

Guyer, J. J., Fabrigar, L. R., Vaughan-Johnston, T. I., & Tang, C. (March 2018). Source attributes mediate the effects of affective voice-content congruency on persuasion. Poster presented at the Society for Personality and Social Psychology conference, in Atlanta, Georgia, USA.

Guyer, J. J., & Fabrigar, L. R. (April 2017). The influence of confession specificity on the efficacy of stealing thunder in a political context. Poster presented at the Midwestern Psychological Association conference, in Chicago, Illinois, USA.

Guyer, J. J., & Fabrigar, L. R. (Jan. 2017). Vocal confidence and persuasion: Speech rate affects amount of processing under moderate elaboration. Poster presented at the Society for Personality and Social Psychology conference, in San Antonio, Texas, USA.

Guyer, J. J., Fabrigar, L. R., Vaughan-Johnston, T. I., & Terry, G. (June 2016). The influence of scarcity on behavioral intentions: “Click, Whirr” tells only half the story. Poster presented at the Canadian Psychological Association conference, in Victoria, British Columbia, Canada.

Guyer, J. J., Maracle, A. C., Vaughan-Johnston, T. I., Seligman, N., & Fabrigar, L. R. (June 2016). The differential interplay of vocal pitch and gender on attitudes. Poster presented at the Canadian Psychological Association conference, in Victoria, British Columbia, Canada.

Guyer, J. J., Fabrigar, L. R., Vaughan-Johnston, T. I., & Seligman, N. (May 2016). Investigating the hypothesized non-linear influence of speech rate on speaker confidence and attitudes. Poster presented at the Association for Psychological Science conference, in Chicago, Illinois, USA.

Guyer, J. J., Fabrigar, L. R., Vaughan-Johnston, T. I., & Seligman, N. (May 2016). The effects of vocal intonation on perceptions of speaker confidence and attitudes. Poster presented at the Association for Psychological Science conference, in Chicago, Illinois, USA.

Guyer, J. J., Maracle, A. C., Fabrigar, L. R., & Kan, M. P. H., & Terry, G. (Jan 2016). The multiple roles of vocal pitch in attitude change. Poster presented at the Society for Personality and Social Psychology conference, in San Diego, California, USA.

Guyer, J. J., Maracle, A. C., Chouchkova, A., & Fabrigar, L. R. (June 2015). The effects of vocal pitch on persuasion as a function of age-based trait perceptions. Poster presented at the Canadian Psychological Association conference, in Ottawa, Ontario, Canada.

Guyer, J. J., & Fabrigar, L. R. (May 2015). Investigating the multiple roles of vocal confidence in attitude change. Poster presented at the Association for Psychological Science conference, in New York, New York, USA.

Guyer, J. J., Fabrigar, L. R., Maracle, A. C., & Chouchkova, A. (May 2015). The persuasive power of vocal pitch and the role of speaker confidence. Poster presented at the Midwestern Psychological Association conference, in Chicago, Illinois, USA.

Guyer, J. J., & Fabrigar, L. R. (Feb. 2015). Matching and mismatching vocal affect with message content: Is the effect real and why might it occur? Poster presented at the Society for Personality and Social Psychology conference, in Long Beach, California, USA.

Guyer, J. J., Fabrigar, L. R., & Maracle, A. C. (Aug. 2014). Pitch, vocal confidence, and the moderating role of age. Poster presented at the American Psychology Association conference, in Washington D.C., USA.

Guyer, J. J., & Fabrigar, L. R., & Tang, C. (Feb. 2014). Matching and mismatching vocal affect with cognitively-based persuasive messages. Poster presented at the Society for Personality and Social Psychology conference, in Austin, Texas, USA.

Guyer, J. J., & Fabrigar, L. R., & Tang, C. (Jan. 2013). Matching and mismatching vocal affect with affectively-based persuasive messages. Poster presented at the Society for Personality and Social Psychology conference, in New Orleans, Louisiana, USA.

Guyer, J. J., & Reichl, A. J. (May 2008). Attitudes in the face of adversity: Differential responses of high and low self-monitors to commitment, normative influence, and argument strength. Poster presented at the Connecting Minds conference, in Vancouver, British Columbia, Canada.

Honors and Awards

Outstanding Excellence in Teaching Award (2019-2024)
IE University, Madrid (29 awards over 6 years)

Faculty Award for Teaching Excellence (2020, 2021)
Saint Louis University — Madrid Campus

SPSP Teacher/Scholar Conference Registration Award (Sept. 2020)

SPSP Best Online Syllabi (July 2020)
Top three best online syllabi (Learning to Observe, Experiment, and Survey)

Research Scholar Travel Award – 900 euros / 1500 euros (2019, 2020)
Saint Louis University — Madrid Campus

SPSP Small Research Grant Award - $1500 USD (Sept. 2019)
The Role of Vocal Confidence in Persuasion: A Self-Validation Perspective

Postdoctoral Research Scholar Travel Award - 1000 euros (April 2019)
Universidad Autónoma de Madrid

SPSP Teacher/Scholar Travel Award - $500 USD (Sept. 2017)

Canadian Psychological Association Certificate of Academic Excellence (2016-2017)
Best Doctoral Dissertation

Association for Psychological Science Travel Award - $200 CAD
(May 2016, 2017)

Queen's University Travel Award - $150 CAD (2012-2016)

R.S. McLaughlin Fellowship - $10,000 CAD (Sept. 2014)
Awarded to top three graduate students in psychology department with highest GPA