Boundary conditions and cognitive mechanisms of the time-space framing effect: dual-modality evidence based on the...

The time-space framing effect describes systematic preference changes when identical travel decisions are described using temporal versus spatial distance representations. Understanding when and why this effect occurs holds theoretical and practical importance for decision science and behavioral interventions in travel contexts.

Three experiments were conducted to examine boundary conditions and cognitive mechanisms of the time-space framing effect. Experiment 1 employed a within-subjects design and constructed 20 binary decision problems (1,038 participants) to identify when framing effects emerge. Experiment 2 used visual analog scales to measure intradimensional difference comparisons (320 participants, between-subjects design) and tested whether framing effects operate through changes in perceived intradimensional differences. Experiment 3 employed eye-tracking (43 participants, within-subjects design) to objectively assess whether individuals adopt dimension-based processing strategies and whether processing patterns predict choices and choice reversals. Statistical analyses included χ² tests, mediation analyses, mixed-effects regressions, and Bayes factor analyses.

The time-space framing effect exhibited a twofold pattern determined by how frames altered the perceived intradimensional differences: frames that magnified perceived distance differences shifted preferences toward the distance-superior option, whereas frames that reduced these differences shifted preferences toward the outcome-superior option. The effect was absent when perceived intradimensional differences remained unchanged across frames. Mediation analyses indicated that changes in perceived intradimensional differences mediated the relationship between frame manipulation and choice preference, and that the presence or absence of such changes constituted a key boundary condition for the occurrence of framing effects. Eye-tracking showed that 95% of participants employed dimension-based strategies, with processing differences predicting both choices and choice reversals across frames.

Time-space framing effects arise from systematic shifts in dimensional comparison processes rather than superficial presentation differences. This mechanistic understanding enables prediction of framing effect direction, providing theoretically grounded guidance for precision nudging in travel contexts.