Schulz, R., & Hanusa, B. H. (1978). Long-term effects of control and predictability-enhancing interventions: Findings and ethical issues.
Examined the long-term effects of participating in a field experiment on the effects of control and predictability-enhancing interventions. 40 retirement home residents who had initially benefited from being exposed to a specific positive predictable or controllable event (visits by college students) were assessed at 3 different intervals after the study was terminated. Health and psychological status data collected 24, 30, and 42 mo after the ...



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