“…Further, environmental consistency (i.e., the degree to which an environment is composed of like or reasonably similar personality types) and differentiation (i.e., the degree to which an environment is dominated largely by a single personality type) are posited as being positively related to the vocational stability and satisfaction of individuals. Periodic critiques of the research literature on vocational behavior and career development by Osipow (1976), Betz (1977), Zytowski (1978), and Walsh (1979) provide additional insights into the background theory of Holland's (1973) propositions and related empirical findings. Walsh (1973) also provided a thorough summary and critique of five person-environment interaction models based on six attributes of formal theories (i.e., comprehensiveness, clarity and explicitness, operational adequacy, incorporation of known findings, parsimony, and generation of empirical research).…”