The effect of categorisation on sensitivity to second-order relations in novel objects.

Area of Science:

• Cognitive Psychology
• Visual Perception
• Neuroscience

Background:

• Adults exhibit heightened sensitivity to configural information, specifically second-order relations (feature spacing), in faces compared to other objects.
• This superior face processing is hypothesized to stem from experience with individual-level face categorization (e.g., recognizing specific people) versus basic-level categorization for objects (e.g., identifying a chair).

Purpose of the Study:

• To investigate whether training in individual-level categorization can enhance sensitivity to second-order relations in non-face stimuli.
• To test the hypothesis that experience with individual-level categorization underlies adults' greater sensitivity to second-order relations in faces.

Main Methods:

• Two groups were trained on novel blob stimuli.
• One group learned basic-level categorization (number of blobs), while the other learned both basic and individual-level categorization (blob spacing).
• Sensitivity to second-order relations in new exemplars was tested after training.

Main Results:

• Participants trained on individual-level categorization demonstrated significantly greater sensitivity to second-order relations in the novel stimuli compared to those trained only on basic-level categorization.
• This study provides the first evidence of specific improvements in second-order relation sensitivity through training with non-face stimuli.

Conclusions:

• The findings support the hypothesis that enhanced sensitivity to second-order relations in faces is, in part, a consequence of extensive experience with individual-level face identification.
• Training can induce specific improvements in the perception of second-order relations, suggesting a flexible learning mechanism in visual perception.