kəntˌæmᵻnˈeɪʃən baɪ kɹˈɔsɪŋ ˌoʊvɚ mˈeɪ biː mˈoːɹ lˈaɪkli sˈɪns pˈeɪʃənts ɐsˈaɪnd tə ðə tɹˈiːtmənt ɡɹˈuːp ɑːɹ fˈʊli ɐwˈɛɹ ʌv ðɛɹ ɐsˈaɪnmənt.
Contamination by crossing over may be more likely since patients assigned to the treatment group are fully aware of their assignment.