The contemporary literature investigating the construct broadly known as time perspective is replete with
methodological and conceptual concerns. These concerns focus on the reliability and factorial validity of
measurement tools, and the sample-specific modification of scales. These issues continue to hamper the
development of this potentially useful psychological construct. An emerging body of evidence has supported
the six-factor structure of scores on the Adolescent Time Inventory–Time Attitudes Scale, as well as their
reliability. The present study utilized data from the first wave of a longitudinal study in the United Kingdom to
examine the reliability, validity, and cross-cultural invariance of the scale. Results showed that the hypothesized
six-factor model provided the best fit for the data; all alpha and omega estimates were N.70; scores on ATI-TA
factors related meaningfully to self-efficacy scores; and the factor structure was invariant across both research
sites. Results are discussed in the context of the extant temporal literature.