Description

The Trier Social Stress Test (TSST) is a standardized laboratory protocol designed to induce acute psychosocial stress. It was developed by Kirschbaum, Pirke, and Hellhammer in 1993 and is widely used to investigate psychological, neuroendocrine, autonomic, and cardiovascular responses to social-evaluative situations.

The TSST is not a conventional questionnaire or psychometric scale and therefore does not produce a single total score. It is an experimental procedure combining social evaluation, unpredictability, and limited personal control. These characteristics typically activate the hypothalamic–pituitary–adrenal axis and the sympathetic nervous system.

Purpose

The primary purpose of the TSST is to induce a controlled and comparable acute stress response. It enables researchers to examine:

  • individual differences in psychobiological stress reactivity,
  • activation and recovery following stress exposure,
  • associations between subjective stress and physiological responses,
  • the influence of biological, demographic, and psychosocial factors,
  • the effectiveness of stress-management interventions.

The protocol has been employed in research on anxiety, depression, resilience, emotional regulation, social evaluation, and the effects of stress on cognitive performance.

Administration Procedure

The standard TSST generally includes three main stages:

Preparation period: Participants are informed that they must deliver a brief presentation, usually as part of a simulated job interview, and are given approximately 10 minutes to prepare.

Public-speaking task: Participants deliver a five-minute speech before a panel of evaluators who maintain a neutral and non-supportive manner.

Mental arithmetic task: Participants complete a five-minute mental arithmetic exercise, such as repeatedly subtracting a particular number. When an error occurs, they are usually instructed to restart from the beginning.

The procedure is followed by a recovery period and a full debriefing concerning the actual purpose of the experiment.

Measurements

Responses to the TSST are assessed using biological, physiological, and psychological indicators. Common measurements include:

  • salivary or blood cortisol,
  • heart rate and heart-rate variability,
  • blood pressure,
  • electrodermal activity,
  • salivary alpha-amylase,
  • subjective ratings of stress, tension, and emotional state.

Measurements are obtained before, during, and at multiple time points after the procedure to assess baseline functioning, peak reactivity, and recovery.

Data Analysis

Analysis generally focuses on changes relative to baseline. Researchers may calculate maximum increases, time to peak response, area under the curve, and the rate at which physiological indicators return toward baseline levels.

Repeated-measures analysis of variance or linear mixed-effects models may be used to examine changes over time. Correlation, regression, or group-comparison methods can investigate individual differences and associations between biological and psychological responses.

Standardization

Reliable comparisons require strict standardization of the procedure. Relevant factors include the time of testing, food and caffeine consumption, smoking, physical activity, medication use, sleep, and, where appropriate, menstrual-cycle characteristics.

The composition and behavior of the evaluation panel, duration of each stage, and timing of biological sampling should remain consistent. Modified versions—including protocols for children, groups, online administration, and virtual-reality environments—should not automatically be considered equivalent to the original TSST.

Ethical Considerations

Because the TSST deliberately induces psychosocial stress, its administration requires approval from an appropriate research ethics committee, informed consent, and clearly defined inclusion and exclusion criteria.

Participants should receive appropriate monitoring, post-procedure support, and a full debriefing. The protocol should be conducted only by suitably trained research personnel and should not be used as a clinical diagnostic test.

References

Birkett, M. A. (2011). The Trier Social Stress Test protocol for inducing psychological stress. Journal of Visualized Experiments, 56, e3238.

Dickerson, S. S., & Kemeny, M. E. (2004). Acute stressors and cortisol responses: A theoretical integration and synthesis of laboratory research. Psychological Bulletin, 130(3), 355–391. https://doi.org/10.1037/0033-2909.130.3.355

Kirschbaum, C., Pirke, K. M., & Hellhammer, D. H. (1993). The “Trier Social Stress Test”—A tool for investigating psychobiological stress responses in a laboratory setting. Neuropsychobiology, 28(1–2), 76–81.

Linares, N. F., Charron, V., Ouimet, A. J., Labelle, P. R., & Plamondon, H. (2020). A systematic review of the Trier Social Stress Test methodology: Issues in promoting study comparison and replicable research. Neurobiology of Stress, 13, 100235.