Individual differences in the need for cognition are typically assessed using the 18-item Need for cognition
scale (NCS) developed by Cacioppo and Petty (1982). However, in contrast to the unidimensional model proposed by the scale developers, recent factor analyses have introduced two -and three- dimensional models of the scale. Confirmatory factor analyses were used in this study to evaluate different measurement models based on data provided by 590 (236 males, 354 females) young adult members of the general public. Although some alternative models showed promise, a single factor model with
method effects associated with positively and negatively worded items provided best fit. Implications for the asses
sment of need for cognition are considered
