The benefit of choice on task performance: Reduced difficulty effects in free-choice versus forced-choice tasks

Mittelstädt, Victor; Mackenzie, Ian Grant; Baier, Denise; Goetz, Lili; Wittbecker, Pia; Leuthold, Hartmut · 2024 · OpenAlex-citations

DOI: 10.3758/s13421-024-01641-5

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Summary

This study investigates how self-determined (free-choice) versus imposed (forced-choice) task selection influences performance when task difficulty varies. While previous research established that cognitive and environmental factors guide task choices, it remained unclear whether processing information differs fundamentally between free and forced modes, particularly regarding how difficulty impacts performance. The authors hypothesized that the benefit of autonomy—rooted in self-determination theory and agency—might lead to more stable information processing and greater effort, thereby reducing the negative impact of difficult stimuli in free-choice contexts compared to forced ones. To test this, the researchers conducted three experiments using a hybrid free-forced paradigm. In free-choice trials, participants chose between two tasks; in forced-choice trials, they performed the task associated with the single presented stimulus. Experiments 1 (N=43) and 2 (N=42) manipulated perceptual difficulty by varying the proportion of colored dots in a discrimination task (easy vs. hard ratios). Experiment 3 (N=58) manipulated central decision-processing difficulty by varying the rotation angle of letters (easy vs. hard rotation). All experiments were conducted online, measuring reaction times (RTs) and error rates. The results consistently demonstrated that while harder stimuli impaired performance in both modes, the impairment was significantly less pronounced in free-choice tasks. Across all experiments, significant interactions between processing mode and difficulty were observed in mean RTs. Specifically, the increase in RT caused by difficult stimuli was smaller when participants freely chose the task compared to when they were forced to perform it. This pattern held true even when analyzing only task-repetition trials, ruling out the possibility that the effect was merely due to reduced switching costs. Additionally, participants exhibited a "difficulty choice bias," preferentially selecting tasks with easier stimuli when given the choice, though they still engaged with difficult tasks more effectively than when forced. The findings suggest that having control over task choices enhances performance stability, particularly under challenging conditions. The authors argue that autonomy allows for better alignment of tasks with cognitive states and increases motivational commitment, leading to more efficient processing. This implies that the locus of voluntary choice influences the information processing stream, allowing individuals to mitigate the effects of environmental difficulty. The study highlights that the benefits of choice extend beyond simple preference, actively optimizing performance by reducing the cognitive cost of processing difficult information.

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