hɪz hɪstˈɔːɹɪkəl æz wˈɛl æz hɪz θiəɹˈɛɾɪkəl ɐnˈæləsˌɪs ˈɔːlsoʊ lˈɛd hˌɪm tə kɹˈɪɾɪsˌaɪz ˈɔːɹθədˌɑːks mˈɛθədz ʌv ɛkspˌɛɹɪmˈɛntəl dɪzˈaɪn pɚtˈɪkjʊlɚli ðə "ɹˈuːl ʌv wˈʌn vˈɛɹɪəbəl"ænd tə sədʒˈɛst mˈɛθədz fɔːɹ ɐvˈɔɪdɪŋ wʌt hiː bᵻlˈiːvd təbi ɐn ʌnfˈɔːɹtʃənət ˌɑːɹɾɪfˌɪʃɪˈælᵻɾi ɪnhˈiəɹənt ɪn klˈæsɪkəl ɛkspˌɛɹɪmˈɛntəl pɹəsˈiːdʒɚz.
His historical as well as his theoretical analysis also led him to criticize orthodox methods of experimental design (particularly the "rule of one variable") and to suggest methods for avoiding what he believed to be an unfortunate artificiality inherent in classical experimental procedures.