Related Experiment Video
Updated: Aug 18, 2026

Lexical Decision Task for Studying Written Word Recognition in Adults with and without Dementia or Mild Cognitive Impairment
Published on: June 25, 2019
Comparing compound verb production in Persian-speaking non-brain-damaged adults, and people with fluent and
Shadi Alipour1, Fariba Yadegari1, Robab Teymouri2
1Department of Speech Therapy, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran.
Abstract:
Persian verbs are classified into simple and compound (complex) verbs (CVs). Simple verbs contain one word; CVs comprise more than one word, including nominal and verbal components. This study investigates how people with aphasia (PWA) and non-brain-damaged (NBD) adults produce complex verbs, the types of errors they make and what the effect is of lemma representation and the compound status of the verbs. Forty-five participants, including 11 fluent PWA, 9 non-fluent PWA, and 25 NBDs, completed action naming and connected speech tasks. The findings revealed that CV retrieval was impaired in PWA; although they showed knowledge ('lemma') of the compound structure, they failed to retrieve the phonological form ('lexeme'). We therefore assume a two lemma representation for CVs except for idiomatic CVs, and CVs with a heavier verbal component which are represented as one lemma.
Related Concept Videos
Higher Mental Functions of the Brain: Language
Language formation and comprehension take place in the dominant hemisphere. The dominant hemisphere is responsible for understanding the meaning of spoken, written, or sign language, as well as the ability to communicate. For most people, the left hemisphere is the dominant one. The right hemisphere, then, gives tone and emotional context to the...
Lateralization
Language and Cognition
Components of Language
Language Development
The critical period for language acquisition suggests that the ability to acquire language is at its peak early in life. As people age, this proficiency decreases. Language development begins very...
Visual Agnosia
