An empirical comparison of several interval estimation procedures for coefficient alpha

Following a general introduction to Tukey's Jackknife technique and the construction of approximate confidence intervals, ten variants of the procedure are defined for giving interval estimates for coefficient alpha. A data base of known population characteristics was generated and used to compare the robustness of the ten Jackknife alternatives with Feldt's well-known sampling theory based upon the assumptions of normality. The empirical results indicate that out of the ten variants, defined by five transformations and two methods of data subdivision, only two are justifiable competitors to Feldt's approach.     

Social support as a moderator of the relationship between poverty and coping behavior

This study examined the relationship between poverty and coping and defense behaviors and the way social support moderates this relationship. One hundred fifty Indian adults responded to scales of income, perceived economic status, coping, defense and social support. In addition, physical quality of living was rated on the basis of observation and a short interview. Results showed that income and physical quality of living were positively associated with perceived economic status. Income, physical quality of living, and perceived economic status were negatively related to coping and defense behaviors. Finally, social support did not moderate the impact of poverty on coping and defense behaviors.