letters and words sound alike (i.e., phonological similarity) create interface in memory
e.g., B, V, G, T, C and D or man, ban, can and fan
more interference for phonologically similar words than for words that mean the same thing (i.e., semantic similarity)
e.g., large, huge, giant
delirium, emotion & endocrine disease, metabolic disturbances, eye & ear impairments, nutritional disorders, tumors, toxicity, trauma to head, infectious disorders, alcohol, arteriosclerosis
a consequence of conditions such as depression, infection, metabolic abnormalities, medication use, etc.