Assignment:
Could you please help me understand the following in the attached study? I am especially having problems with identifying threats to validity.
Identify the central claims of the study.
Characterize the type of method(s) used.
Identify actual threats to validity. Drawing on Validity Typology and Validity Threats, discuss the threats you judge are or could have been (if Schulz did not counter them) plausible threats to Schulz's claims about what he has found.
Assess whether Schulz countered the threats you identify. If a threat was not countered, assess if and how it affects Schulz's claims about what he has found.
Readings:
Effects of Control and Predictability on the Physical and Psychological Well-Being of the Institutionalized Aged
By Richard Schulz