Gordon G. Gallup questioned Hauser's findings, and reviewed some video recordings of Hauser's experiment, saying that "when I played the videotapes [for Hauser's experiments], there was not a thread of compelling evidence — scientific or otherwise — that any of the tamarins had learned to correctly decipher mirrored information about themselves.''
ɡˈoːɹdən dʒˈiː. ɡˈælʌp kwˈɛstʃənd hˈɔːsɚz fˈaɪndɪŋz, ænd ɹᵻvjˈuːd sˌʌm vˈɪdɪoʊ ɹᵻkˈoːɹdɪŋz ʌv hˈɔːsɚz ɛkspˈɛɹɪmənt, sˈeɪɪŋ ðˈæt "wˌɛn aɪ plˈeɪd ðə vˈɪdɪoʊtˌeɪps fɔːɹ hˈɔːsɚz ɛkspˈɛɹɪmənts, ðɛɹwˌʌz nˌɑːɾə θɹˈɛd ʌv kəmpˈɛlɪŋ ˈɛvɪdəns — saɪəntˈɪfɪk ɔːɹ ˈʌðɚwˌaɪz — ðæt ˌɛni ʌvðə tˈæmɚɹˌɪnz hæd lˈɜːnd tə kɚɹˈɛktli dᵻsˈaɪfɚ mˈɪɹɚd ˌɪnfɚmˈeɪʃən ɐbˌaʊt ðɛmsˈɛlvz.