Adrenocortical influences on free-operant avoidance behavior.

Researchers gave rats free-operant avoidance sessions. The rats could press a lever any time to postpone shocks.

Some rats got ACTH or dexamethasone shots before sessions. These drugs raise natural stress hormones called glucocorticoids.

Drugged rats showed longer, steadier pauses between lever presses. They also received fewer shocks.

The hormones seemed to smooth out timing and cut errors.

PREMACK et al. (1963) saw the opposite: psychoactive drugs broke up immobility avoidance. The new study shows hormone drugs can stabilize timing instead of disrupting it.

WEINELong (1963) found that adding a response-cost fine hurt human avoidance. Here, no extra cost was needed; internal chemistry alone refined performance.

Billings et al. (1985) showed strong stimulus control shields lever pressing from d-amphetamine damage. A et al. (1967) add that internal hormone shifts can also protect timing without extra cues.

If a client on corticosteroids seems calmer and more accurate during avoidance tasks, this rat work gives a reason. Consider tracking response timing when medical teams change hormone meds. Stable long pauses and fewer escapes may be side effects worth celebrating.