Affect modulated startle in schizophrenia: subjective experience matters.

Area of Science:

• Psychology
• Neuroscience
• Psychiatry

Background:

• Emotion reactivity is a key aspect of psychological well-being.
• The affect-modulated startle paradigm is a common method for measuring emotion reactivity.
• Previous research suggests emotion reactivity in schizophrenia may resemble healthy controls.

Purpose of the Study:

• To investigate if subjective emotional experience differs between individuals with schizophrenia and healthy controls.
• To examine the affect-modulated startle response using both normative and subjective image ratings.
• To determine if schizophrenia influences the perception and processing of emotional stimuli.

Main Methods:

• Seventeen healthy controls (HC) and 17 individuals with schizophrenia (SZ) participated.
• Participants viewed images and rated their valence and arousal.
• The affect-modulated startle response was measured using startle probes during image viewing.

Main Results:

• Both HC and SZ groups showed similar patterns of startle response modulation across positive, neutral, and negative images.
• Schizophrenia patients rated positive images as less positive compared to healthy controls.
• Reclassifying images based on subjective ratings revealed altered startle magnitudes in both groups, with SZ tending to classify neutral images as negative more frequently.

Conclusions:

• Affective stimuli modulate the startle response similarly in individuals with schizophrenia and healthy controls.
• Subjective emotional experience, particularly for positive stimuli, appears to differ between these groups.
• The findings highlight the importance of considering subjective ratings when assessing emotion processing in schizophrenia.