Single Dissociation

Definition: Single dissociation is a research method used in experimental psychology to investigate the specific functions of different cognitive processes or brain regions by comparing performance on two related tasks.

Overview

In single dissociation, the primary objective is to determine if two tasks or processes are independent from each other. This method involves comparing the performance of individuals across two tasks, with each task targeting a specific cognitive process or brain region.

Procedure

The experiment typically involves two conditions: a control condition and an experimental condition. In the control condition, participants perform a task that engages cognitive process A, while in the experimental condition, participants perform a task that engages cognitive process B.

The performance of participants on each task is measured and analyzed. If there is a significant difference in performance between the two tasks, it can be inferred that the cognitive processes or brain regions associated with the tasks are functionally dissociable.

Interpretation

A single dissociation suggests that two cognitive processes or brain regions have distinct functions and do not rely on each other for normal functioning. However, it does not provide information about the nature or strength of the relationship between the processes or regions, or whether they operate independently.

Limitations

Single dissociation alone cannot conclusively determine the relationships or interdependencies between cognitive processes or brain regions. Additional research using double dissociation or other methodologies is often needed to further investigate the nature of these relationships.