ResultsMeans, standard deviations,

Results
Means, standard deviations, and internal reliability coefficients were generated for
the four subscales and two composite scales for the Iranian high school sample.
These are reported in Table 1, along with comparable data reported by Creed and
Patton (2004). The internal reliability coefficients for the Iranian sample ranged
from .64 to .82 for the subscales, and from .74 to .82 for the composite scales,
Int J Educ Vocat Guidance (2011) 11:29–38 33
123
suggesting satisfactory internal reliability, and internal reliability comparable with
that reported by Creed and Patton.
Validity
Construct validity of the CDI-A-SF was investigated in two ways. First, the factor
structure of the CDI-A-SF was tested using factor analysis; and second, the
relationship between the CDI-A-SF and other career relevant variables (career
indecision, career certainty, career decision-making self-efficacy) was assessed. To
test if the factor structure of the CDI-A-SF was consistent with the original CDI
structure, we examined (a) whether the individual items loaded on their respective
subscales, and (b) whether the individual subscales loaded on their respective
attitudinal and knowledge factors.