Walleczek & von Stillfried (2019) offered a critique of an experiment we conducted that was designed to explore possible psychophysical influences on interference patterns generated by an optical double-slit system. The critique claimed that one of eight planned tests in that experiment was a false-positive. Based on that claim, they raised doubts about the results of 16 similar experiments that we previously published. After properly adjusting the eight tests for multiple testing, the false-positive claim is found to be unwarranted. In addition, Walleczek & von Stillfried failed to report a true-positive outcome of a secondary planned hypothesis that remained significant after adjustment for multiple testing. We discuss these and other issues in response to the arguments offered in their critique.To date, 11 of 28 published replications of this type of experiment, reported by four independent teams, report statistically significant outcomes. Given the implications of genuine psychophysical effects on our understanding of the role of consciousness in the physical world, we encourage other researchers to replicate this experiment, and we welcome further discussion about experimental methods and theoretical models regarding this line of inquiry.