VALIDITY

~INTERNAL VALIDITY~

• Whether the observed effect is due to the manipulation of the IV instead of another factor

• A major threat to internal validity is pps responding to demand characteristics

~EXTERNAL VALIDITY~

• Whether or not you can generalise findings to other settings, populations and eras

• ECOLOGICAL VALIDITY: whether or not findings can be generalised to real-life settings

~TEMPORAL VALIDITY~

• Whether or not the findings of a study, concept or theory stays true over time

~FACE VALIDITY~

• Whether or not a test or scale appears ‘on the face of it’ to measure what it is supposed to measure

• Determined by simply scrutinising the measuring instrument, or getting an expert to check

~CONCURRENT VALIDITY~

• Wether or not a new psychological measure relates to an existing, similar measure (valid if the correlation coefficient > 0.8)