Validity and Reliability
The content validity of the measures was censured by
conceptualization andoperationalization of the domains of the variables
based on an adequate literature review.The dimensions and element of the
variables were delineated carefully after developingthe working definitions
based on the literature. The instruments were developed with thecareful
judgment of the researchers. The instruments (with regard to the two
constructsnamely practice of SHRM and competency of human resource
manager) had a highdegree of internal consistency reliability (alpha). These
evidences support the contentvalidity of the instruments of this study. The
construct validity of the variables of thisstudy was ensured as the correlation
analysis supported the hypotheses (except one)formulated linking the
relationship between practice of SHRM and the independentvariables. To
measure the external reliability of the questionnaire, which consisted of
allthe measures for the study (relating to six variables), a test-retest was
conducted by using10 Heads of HRM in Jordan listed companies with a
two-week time interval betweenthe two administrations. The coefficient of
the test-retest of the questionnaire was 0.890suggesting that the measures
possessed a high external reliability. To measure the interitemconsistency
reliability the Cronbach’s Alpha test was used (results are given in table1).
According to the results of the test there was an adequate degree of internal
reliabilitywith regard to the constructs (practice of SHRM and competency
of human resourcemanager).