Touching soft materials slows affective visual processing

Area of Science:

• Psychology
• Neuroscience
• Cognitive Science

Background:

• Multisensory integration between tactile and visual systems is well-established for cognitive tasks like object recognition.
• The impact of multisensory interactions on affective (emotional) processing remains less understood.
• This study investigates how tactile input modulates the emotional evaluation of visual stimuli.

Purpose of the Study:

• To examine the influence of tactile perception on the affective processing of visual stimuli.
• To determine if tactile input affects the speed or accuracy of emotional valence ratings.
• To differentiate the effect of tactile input on affective versus semantic (cognitive) visual processing.

Main Methods:

• Two experiments were conducted using urethane rubbers of varying compliance (hard vs. soft) and visually presented words.
• Participants rated the affective valence of words while touching different textures.
• A second experiment assessed abstractness ratings to distinguish affective from cognitive processing.

Main Results:

• Touching a soft stimulus significantly slowed the reaction time for affective valence ratings of visual words.
• The tactile manipulation did not alter the valence ratings themselves.
• Abstractness ratings (semantic processing) were unaffected by the tactile stimuli.

Conclusions:

• Tactile perception influences the speed of affective visual processing.
• An attentional mechanism may underlie the observed effect of touch on emotional perception.
• This highlights a novel pathway through which somatosensory input modulates emotional responses to visual information.