PSCH 242 Lecture Notes - Lecture 3: Confounding, Measuring Instrument, Stereotype Threat
Document Summary
Maturation: results attributed to time passing rather than independent variable. Instrumentation: any change in calibration of measuring instrument over the study. Selection: any factor that creates groups that are not equal at the start of the study. Statistical regression: tendency for participants selected because of extreme scores to be less extreme on a retest. Diffustion of treatments: changes in participant behavior due to information obtained about other conditions, this information contaminates other conditions. Sequence effects: effects on performance in one condition due to experience with previous conditions, within subject designs. Testing effects: repeated measureme(cid:374)t of the sa(cid:373)e i(cid:374)dividual (cid:373)ay i(cid:373)pa(cid:272)t pe(cid:396)so(cid:374)"s su(cid:271)se(cid:395)ue(cid:374)t s(cid:272)o(cid:396)es. History: events that take place during the course of a research study influence the outcome of the study. Subject effects: participants are not passive recipients of treatment, Reactivity: changes in behavior of research participants as a result of their knowledge that they are part of a research project hawthorne effect.
