Recent controversy surrounds the use of the Trail Making Test as a measure of cognitive flexibility, given that the Trail Making Test, Part B (TMT-B) also differs from Part A (TMT-A) in factors of motor control and perceptual complexity. The present study compared performance in the TMT and a set-switching task in order to test the assumption that cognitive flexibility is captured in TMT-B performance. Set-switching tasks have low motor and perceptual selection demands, and therefore provide a clearer index of executive function. In this study, participants made category judgments for digits, letters, or symbols across a series of trials, and performance for consecutive same-task trials was compared with task-switch trials. Results of the set-switching task indicated significant switch cost, but only for the situation of task alternation (e.g., an ABA series), suggesting that task-set inhibition may play a role in this effect. Alternating-switch cost was significantly correlated with TMT-B performance, especially with the TMT-B to TMT-A ratio (B/A). Cost for alternating switches was especially large for participants with B/A ratio > 3. These results provide direct evidence that the B/A ratio of performance in the TMT provides an index of executive function.

Purpose-Many education for sustainable development (ESD) programs are designed to change attitudes and values toward the natural environment. However, psychological research indicates that several factors in addition to attitude influence behavior, including contextual support, social norms, action difficulty, and habitual behavior. Thus, if attitude change is to translate into altered behavior, education must extend beyond attitudes to assist people to act in ways consistent with their values. The purpose of this paper is to review the psychological research showing weak correlation between attitudes and behavior, the factors that mediate this relationship, and to describe the implications of these findings for university institutions and ESD programs. Design/methodology/approach-The paper is organized as a review and editorial article, describing relevant research, and outlining implications and suggested actions. Findings-The results of the reviewed research indicate that attitude-behavior correlations are mediated by several factors, including contextual conditions such as inconvenience and personal factors such as habits. Practical implications-The implications of these findings are that ESD programs should specifically address factors that mediate the attitude-behavior relationship, including contextual changes and the development of personal management plans. Examples for each type of change are suggested. Originality/value-The implications of these findings for ESD programs have not previously been highlighted. Specifically, to achieve sustainable development requires attention to these mediating factors as well as to knowledge generation and attitude change. Thus, the value of this paper is to encourage ESD developers to expand their programs to encourage contextual change and personal behavior management plans.

Executive processes necessary for flexibly switching between different tasks were studied using a set switching paradigm that requires participants to rapidly switch between different tasks across consecutive trials. Switch cost reflects poorer performance for task-switch trials than for consecutive same-task trials. Significant switch cost was

Task-switching performance is strongly influenced by whether the imperative stimulus uniquely specifies which task to perform: Switch cost is substantial with bivalent stimuli but is greatly reduced with univalent stimuli, suggesting that available contextual information influences processing in task-switching situations. The present study examined whether task-relevant information provided by task cues influences the magnitude of switch cost in a parallel manner. Cues presented 500 ms prior to a trivalent stimulus indicated which of three tasks to perform. These cues either had a preexisting association with the to-be-performed task (verbal cues), or a recently learned association with the task (spatial and shape cues). The results paralleled the effects of stimulus bivalence: substantial switch cost with recently learned cue-task associations and greatly reduced switch cost with preexisting cue-task associations. This suggests that both stimulus-based and cuebased information can activate the relevant task set, possibly providing external support to endogenous control processes. Alternating-switch cost, a greater cost for switching back to a recently abandoned task, was also observed with both preexisting and recently learned cue-task associations, but only when all tasks were presented in a consistent spatial location. When spatial location was used to cue the to-be-performed tasks, no alternating-switch cost was observed, suggesting that different processes may be involved when tasks are uniquely located in space.