The Reassuring Absence of Acute Stress Effects on IQ Test Performance
Abstract
1. Introduction
2. Materials and Methods
2.1. Participants
2.2. Stress Induction and Assessment
2.3. Assessment of Test Anxiety
2.4. Assessment of Fluid Intelligence
2.5. Experimental Procedure
2.6. Statistical Analysis
3. Results
3.1. Increase in Physiological and Subjective Stress Markers After Stress Induction
3.2. Stress and Test Anxiety Do Not Affect IQ-Test Performance
3.3. Exploratory Analysis: IQ Subscales
4. Discussion
Limitations
5. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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dz | f | Power (1 − β) |
---|---|---|
0.2 | 0.063 | 0.235 |
0.3 | 0.095 | 0.457 |
0.4 | 0.123 | 0.694 |
0.5 | 0.158 | 0.869 |
0.6 | 0.190 | 0.959 |
0.7 | 0.221 | 0.991 |
0.8 | 0.253 | 0.999 |
Control Condition | Stress Condition | p | |
---|---|---|---|
difficulty | 1.25 ± 4.04 | 65.00 ± 25.12 | <.001 |
unpleasantness | 3.00 ± 13.44 | 49.75 ± 31.74 | <.001 |
stressfulness | 1.50 ± 4.27 | 44.75 ± 29.53 | <.001 |
painfulness | 0.75 ± 3.50 | 71.75 ± 23.95 | <.001 |
Control Condition | Stress Condition | Cohen’s d | |
---|---|---|---|
total IQ | 113.20 ± 14.02 | 114.48 ± 14.66 | 0.09 |
numerical IQ | 113.91 ± 15.13 | 115.04 ± 16.56 | 0.07 |
verbal IQ | 109.56 ± 11.87 | 110.76 ± 11.27 | 0.10 |
figural IQ | 106.26 ± 16.16 | 106.64 ± 14.53 | 0.02 |
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Akan, O.; Yildirim, M.; Wolf, O.T. The Reassuring Absence of Acute Stress Effects on IQ Test Performance. J. Intell. 2025, 13, 131. https://doi.org/10.3390/jintelligence13100131
Akan O, Yildirim M, Wolf OT. The Reassuring Absence of Acute Stress Effects on IQ Test Performance. Journal of Intelligence. 2025; 13(10):131. https://doi.org/10.3390/jintelligence13100131
Chicago/Turabian StyleAkan, Osman, Mustafa Yildirim, and Oliver T. Wolf. 2025. "The Reassuring Absence of Acute Stress Effects on IQ Test Performance" Journal of Intelligence 13, no. 10: 131. https://doi.org/10.3390/jintelligence13100131
APA StyleAkan, O., Yildirim, M., & Wolf, O. T. (2025). The Reassuring Absence of Acute Stress Effects on IQ Test Performance. Journal of Intelligence, 13(10), 131. https://doi.org/10.3390/jintelligence13100131