Jane sits for long periods with her arm bent and leg crossed. What is this an example of?

The behavior described in the scenario, where Jane sits for long periods with her arm bent and leg crossed, can be considered an example of catatonia. This condition is characterized by marked psychomotor disturbances, which can include a lack of movement, unusual postures, or prolonged periods of immobility. In catatonia, individuals may adopt abnormal body positions and maintain them for extended durations, as seen with Jane's crossed leg and bent arm.

In contrast, stereotypy refers to repetitive, fixed patterns of physical movement or speech that are not goal-directed, while psychomotor agitation involves excessive movement generally associated with feelings of tension or anxiety. Muscle rigidity specifically describes a condition where the muscles remain stiff and resistant to movement, which is distinct from the positioning observed in catatonia. Therefore, Jane's behavior of remaining in a specific posture over time aligns closely with the characteristics of catatonia.