Response durations for simple key presses are an easily available but heavily underused measure. Whereas response times are integral to the toolbox of experimental psychologists – including many studies featured on past TeaPs –, any study with standard keypress responses also allows for measuring response durations as the interval from response onset to response offset. Response times and durations are decidedly independent, so that response durations hold great promise as a means to uncover unique perspectives on cognitive processing. I present recent findings on response durations in different contexts to highlight that this inconspicuous measure deserves much more attention than it has attracted so far. Given that it comes at no extra cost for common experimental setups, any researcher is well advised to consider adding the measure of response duration to their empirical toolbox.