Remembering the snake in the grass: Threat enhances recognition but not source memory

Area of Science:

• Cognitive Psychology
• Neuroscience
• Memory Studies

Background:

• Research on emotion's influence on source memory presents conflicting results.
• The object-based framework posits that negative arousal enhances attention and within-object binding, improving source memory for emotional stimuli's intrinsic context.
• Previous studies indicate emotional memory enhancement, but its effect on source memory remains debated.

Purpose of the Study:

• To investigate the impact of emotional arousal on both item recognition and source memory.
• To test the object-based framework's prediction regarding emotion's effect on intrinsic source memory.
• To determine if emotional memory enhancement extends to contextual details.

Main Methods:

• Three experiments were conducted using pictures of threatening and harmless animals with experimentally manipulated colors.
• Participants underwent an old-new recognition test for the animal stimuli.
• Source memory for the animals' color was subsequently assessed.

Main Results:

• Consistent across all experiments, old-new recognition was significantly better for more threatening animal stimuli.
• This emotional memory enhancement was attributed to the stimuli's emotional properties, not specific to snake imagery.
• Contrary to the object-based framework's predictions, intrinsic source memory for color was not affected by emotion.

Conclusions:

• Emotional stimuli enhance item recognition, confirming prior findings on emotional memory enhancement.
• The object-based framework's prediction of improved intrinsic source memory due to emotion was not supported.
• Emotion appears to selectively enhance memory for the stimulus itself, rather than its contextual associations.