The proliferation of interaction terms increases the risk that some hypothesis test will produce a false positive by chance.
ðə pɹəlˌɪfɚɹˈeɪʃən ʌv ˌɪntɚɹˈækʃən tˈɜːmz ˈɪŋkɹiːsᵻz ðə ɹˈɪsk ðæt sˌʌm haɪpˈɑːθəsˌɪs tˈɛst wɪl pɹədˈuːs ɐ fˈɔls pˈɑːzᵻtˌɪv baɪ tʃˈæns.