PY 251 Lecture Notes - Lecture 5: Face Validity, Measuring Instrument, Content Validity
Document Summary
Nature of variable: discrete fixed number. Credit hour per semester: continuous infinite measure. Scales of measurement: nominal a variable with no number value (identity) Graduate or drop out: ordinal rank orderd a long a continuum (identity and magnitude) Bigger than something or btter than something but not know by how much. Interval interval all the same (umbers) (identity and magnitude and equal unit size) Temperature: ration has an equal unit size but ability to equal zero (identity magnitude equal unit size absolute zero) Indepth examples/simplifications: nominal no order, no units. Budwieser, miller, coors: ordinal no units but order. Interval order and units and ambigious zero. No zero: ratio order and units and absolute zero, form ratios. Time: ration scale if timing something. 4 types of measurement: self report- asking the person what they think, do, or feel, test - measure made to assess individuals differences, behavioural/observational observing and noting behavior, physical measures of bodily activity.
