The Reassuring Absence of Acute Stress Effects on IQ Test Performance

Area of Science:

• Psychology
• Cognitive Science
• Neuroscience

Background:

• Acute stress can impair executive functions, which are linked to intelligence.
• The influence of pre-test stress and test anxiety on intelligence test performance remains unclear.
• Intelligence is generally stable, but test performance can be affected by psychological factors.

Purpose of the Study:

• To investigate the effects of acute stress and test anxiety on intelligence test performance.
• To examine the interaction between acute stress and test anxiety in influencing intelligence quotient (IQ).

Main Methods:

• Forty male participants completed two testing sessions.
• Acute stress was induced using the socially evaluated cold-pressor test (SECPT) or a control procedure.
• Intelligence was assessed using parallel versions of the Intelligence Structure Test 2000 R (I-S-T 2000 R).
• Trait test anxiety was measured using the German Test Anxiety Inventory (TAI-G).

Main Results:

• Neither acute stress nor test anxiety significantly affected IQ scores.
• No significant interaction was found between acute stress and test anxiety.
• IQ scores significantly increased from the first to the second testing day, indicating a practice effect.
• Bayesian analyses supported the absence of significant effects for stress and anxiety.

Conclusions:

• Acute stress and test anxiety do not appear to significantly impact intelligence test performance in this study.
• Repeated testing can lead to performance improvements, necessitating careful consideration in research and clinical applications.
• The findings suggest that intelligence test scores may be robust to short-term psychological stressors and anxiety.