Assignment 01
Due date Unique Number
23 May 2014 887224

Question 1

Question 2

Question3
3.1
1. Face validity: it is extent to which on the surface an instrument looks like it is measuring a particular characteristic. Face validity is often useful for ensuring the cooperation of people who are participating in a research study. But because it relies entirely on subjective judgement, it is not , in and of itself, a terribly dependable indicator that an instrument is truly measuring what the researcher wants to measure.
Content validity: is the extent to which a measurement instrument is a representative sample of the content area being measured. Content validity is often a consideration when a researcher wants to assess people’s achievement in some area- for instance, the knowledge students have learned during classroom instruction or the job skills workers have acquired in a training program. A measurement instrument has high content validity if its items or questions reflect the various parts of the content domain in appropriate proportions and if it requires the particular behaviours and skills that are central to that domain.
Criterion validity: is the extent to which the results of an assessment instrument correlate with another, presumably related measure (the latter measure is in this case, the criterion), for example, a personality test designed to assess a person’s shyness or outgoingness has criterion validity if its scores correlate with other measures of a person’s general sociability. An instrument designed to measure a salesperson’s effectiveness on the job should correlate with the number of sales the individual actually makes during the course of a business week.

Construct validity: is the extent to which an instrument measures a characteristic that cannot be directly observed but is assumed to exist base on patterns in