Production of Inflected Novel Words in Older Adults With and Without Dementia

While cognitive changes in aging and neurodegenerative disease have been widely studied, language changes in these populations are less well understood. Inflecting novel words in a language with complex inflectional paradigms provides a good opportunity to observe how language processes change in normal and abnormal aging. Studies of language acquisition suggest that children inflect novel words based on their phonological similarity to real words they already know. It is unclear whether speakers continue to use the same strategy when encountering novel words throughout the lifespan or whether adult speakers apply symbolic rules. We administered a simple speech elicitation task involving Finnish-conforming pseudo-words and real Finnish words to healthy older adults, individuals with mild cognitive impairment, and individuals with Alzheimer's disease (AD) to investigate inflectional choices in these groups and how linguistic variables and disease severity predict inflection patterns. Phonological resemblance of novel words to both a regular and an irregular inflectional type, as well as bigram frequency of the novel words, significantly influenced participants' inflectional choices for novel words among the healthy elderly group and people with AD. The results support theories of inflection by phonological analogy (single-route models) and contradict theories advocating for formal symbolic rules (dual-route models).     

Developmental Changes in Self-Perceptions of Intelligence and Self-Confidence

Sex differences in self-perceptions of intelligence and self-confidence were examined among third through eighth graders. In third grade, differences between the sexes were small and, in the case of perceptions of intelligence, favored the females. By fifth grade, males were more likely to describe themselves as smart and self-confident than were females. These differences persisted into the eighth grade. Further analyses indicated that the sex differences could not be adequately explained by the process of internalizing sex-stereotypes.     

Epidemiology of Suicidal Behavior

This paper presents the epidemiology of suicide and discusses the known risk factors for suicide within a framework designed to encourage a systematic approach to theory testing and prevention. Mental and addictive disorders are the most powerful of the multiple risk factors for suicide in all age groups. Since risk factors for suicide rarely occur in isolation, prevention efforts are more likely to succeed if multiple risk factors are targeted.