What came before: Assimilation effects in the categorization of time intervals

Area of Science:

• Cognitive Psychology
• Psychophysics

Background:

• Assimilation is a known cognitive effect where judgments approach prior stimuli.
• Temporal judgment, specifically duration perception, remains relatively unexplored in assimilation research.

Purpose of the Study:

• To investigate the assimilation effect in duration judgments.
• To determine if prior judgments or objective stimulus durations primarily influence temporal perception.

Main Methods:

• Five experiments involving participants judging visual stimulus durations.
• Manipulation of stimulus duration patterns to differentiate objective and subjective influences.

Main Results:

• Duration judgments were predominantly driven by previous judgments.
• Minimal to no effect of prior objective stimulus duration on subsequent judgments was observed.

Conclusions:

• Prior judgments significantly impact current duration perception, a finding contrasting with non-temporal judgments.
• Proposed mechanisms include representational and assimilation accounts, with implications for predictive coding models.