Over-reduplication in a Sundanese-Indonesian Bilingual with Mixed Aphasia after Typhoid Meningitis: A Psycholinguistics Case Study

Ninah Hasanah (Institut Pendidikan Indonesia Garut)
Ardi Mulyana Haryadi (Institut Pendidikan Indonesia Garut)
Ayu Lestari

Alinea: Jurnal Bahasa, Sastra, dan Pengajaran
Vol. 6 No. 3 (2026): Alinea: Jurnal Bahasa, Sastra, dan Pengajaran

Over-reduplication in bilingual aphasia has received limited attention, particularly among Sundanese–Indonesian speakers. This intrinsic case study examined reduplication patterns in one Sundanese–Indonesian bilingual speaker with mixed aphasia following typhoid meningitis. Data from spontaneous interactions, telephone conversations, WhatsApp exchanges, and structured elicitation tasks yielded 40 reduplication tokens. Each token was classified by morphological structure and relation to expected linguistic forms and communicative contexts. Structural categories comprised full reduplication, full reduplication with affixation, partial reduplication with full affixation, partial reduplication with affixation, and partial reduplication (dwipurwa). Productions were classified as anomalous or deviant; anomalous forms were not ordinarily used by general Sundanese speakers, whereas deviant forms departed from expected morphological, grammatical, semantic, or contextual patterns. The participant produced three full reduplication tokens, three full reduplication with affixation tokens, five partial reduplication with full affixation tokens, 28 partial reduplication with affixation tokens, and one dwipurwa token. Partial reduplication with affixation was most frequent (28/40; 70%). Fourteen tokens were anomalous and 37 deviant; classifications were not mutually exclusive. Although the participant produced repeated morphological material, forms were inconsistently aligned with linguistic norms and communicative expectations, suggesting disruption in morphological selection and monitoring. This study offers a detailed case-based description of over-reduplication in a Sundanese–Indonesian bilingual speaker with mixed aphasia, highlighting how typologically specific reduplication systems may be affected. Findings do not establish specific causal or declarative–procedural mechanisms and should not be generalized broadly. Controlled clinical studies with larger, more diverse samples are required before efficacy-based treatment protocols can be recommended.