Are There Really People With No Inner Voice? Commentary on Nedergaard and Lupyan (2024)

The idea that some people completely lack inner speech is of both scientific and popular interest. In a recent study, Nedergaard and Lupyan compared self-reporting high and low inner-speech-prevalence groups and found that participants in the low-prevalence group performed worse on a verbal working memory test and responded more slowly and less accurately during rhyme judgments. These results represent an original contribution to the study of inner speech. However, the authors go on to draw the unfounded conclusion that their findings, together with previous empirical and anecdotal data, show that some people have no inner speech at all. They have coined the term anendophasia for this trait. This commentary examines Nedergaard and Lupyan's claim of demonstrated anendophasia; I conclude they present no compelling evidence that some individuals lack inner speech.