Annals of Indian Academy of Neurology
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Year : 2022  |  Volume : 25  |  Issue : 6  |  Page : 1080-1086

Exploring novel word learning via fast mapping and explicit encoding in persons with temporal lobe epilepsy

1 R Madhavan Nayar Centre for Comprehensive Epilepsy Care, Department of Neurology, Sree Chitra Institute for Medical Sciences and Technology, Thiruvananthapuram, Kerala, India
2 Department of Speech Language Pathology, All India Institute of Speech and Hearing, Department of Neurology, Mysore, Karnataka, India
3 Institute for Communicative and Cognitive Neurosciences, Thiruvananthapuram, Kerala, India

Correspondence Address:
P Manju Mohan
Speech Language Pathologist, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Medical College Campus, Trivandrum - 695 011, Kerala
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/aian.aian_222_22

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Objective: To explore novel word learning via fast mapping (FM) and explicit encoding (EE) in temporal lobe epilepsy (TLE). Methods: 16 right and 16 left temporal lobe epilepsy (RTLE and LTLE) patients along with 32 normal controls (NC) underwent learning of 24 novel object name pairs through standard FM and EE techniques. Their learning was assessed via a three-choice alternate delayed recognition task on the day of learning and on the following day. Recognition scores were compared using nonparametric statistics across the groups with P value set at <.05. Results: RTLE and NC performed similarly, while LTLE and NC differed significantly in novel word learning irrespective of the method of encoding. LTLE and RTLE differed in EE-based novel word learning alone. Further, with respect to encoding techniques, all groups performed better on EE compared to FM. The novel word associations learned via FM showed a lesser decline compared to EE following overnight integration in RTLE and NC. Conclusion: Novel word learning via FM did not facilitate learning above EE in TLE patients or NC. But FM-based words could better overcome forgetting following overnight integration in RTLE and NC. Hence, it is possible that FM has the potential to improve retention of novel information following overnight integration in RTLE as in NC. However, its efficacy in improving retention in LTLE needs further evidence.

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