The present study examines Saudi ESL learner perception of three syllable-final English nasal contrasts: /n/-/m/, /m/-/ŋ/, and/n/-/ŋ/.It was based primarily on two models, the Perceptual Assimilation Model(PAM)and the Speech Learning Model(SLM), in order to determine how Saudi ESL learners categorized nasal segments in their L2, English.Other models, including the Markedness Differential Hypothesis(MDH), contributed in finding the most difficult contrast.The participants, consisting of 24 Saudis studying in the US, were asked to distinguish between 40 English monosyllabic words...