When it hurts to be misled: a Stroop-like effect in a simple addition production task

Area of Science:

• Cognitive Psychology
• Mathematical Cognition

Background:

• Theories of arithmetic verification propose comparing a produced sum with a presented answer.
• It remains unclear how cognitive processes interact during arithmetic production and verification tasks.

Purpose of the Study:

• To investigate whether individuals can ignore presented answers during arithmetic equation solving.
• To challenge existing models of arithmetic verification.

Main Methods:

• Four experiments were conducted where participants solved simple addition equations.
• Participants were instructed to ignore the provided answer and produce the correct sum.
• Response times were measured under conditions with true, false, blank, letter, or symbol answers presented.

Main Results:

• Participants took significantly longer to produce sums when presented with a false answer compared to true, blank, letter, or symbol conditions.
• This indicates an inability to completely ignore the presented numerical answers, even when instructed to do so.
• The results challenge the notion that arithmetic verification solely relies on post-production comparison.

Conclusions:

• The findings suggest that presented answers, particularly incorrect ones, interfere with arithmetic production.
• This supports theories positing a more integrated use of the arithmetic knowledge base in both production and verification processes.
• Cognitive models of arithmetic should account for this interference effect.