The influence of conscious thought is best observed over time

The capacity for complex, conscious thought is arguably the human mind's most defining feature. Nevertheless, the efficacy of consciousness has long been debated, with some arguing that consciousness is a feckless epiphenomenon or that its influence on behavior is trivial. We focus specifically on conscious thought, which appears to be a uniquely human capacity, rather than the more basic phenomenal consciousness that humans appear to share with other animals. We argue that the influence of conscious thought on behavior is profound, and that to detect this influence requires observing behavior across multiple events scattered across time. In our view, conscious thought is not the executor of behavior but rather serves as an input into an unconscious executive. Specifically, conscious thought comprises mental simulations that enable the person to imagine and respond to reflections on the past, anticipations about the future, and other nonpresent events. Thus, conscious thought should not be expected in most cases to influence behavior directly and in the current moment. Instead, we argue that conscious thought is for planning for the future, that conscious thought changes automatic responses slowly over time, and that accurate conscious reflections requires observation across multiple events. Therefore, to detect conscious thought's influence requires tests with much broader time spans than is typical in extant research. We argue that an empirical approach that takes such a broad perspective is necessary for understanding fully how conscious thought guides behavior, makes decisions, and otherwise adapts the self to the complexities of human social life.