This study focused on the relationships between individual characteristics and learning through
HRD in CSR activities in four Thai firms. Five hypotheses were created to explore the
influential factors on learning in HRD for CSR. Data were collected from the respondents who
participated in HRD in CSR activities organized by the firms. Changes in knowledge, skills,
and attitudes consisting of five aspects of ethical behaviour (a dependent variable), gender,
age, education, years of work experience with the current firm, and years of work experience
with other firms, were analyzed as the influential factors (independent variables) with
participation as the control variable.