Christian P Gruber

Learn More
BACKGROUND Although DSM-IV requires symptoms in three criterion domains for a diagnosis of autistic disorder, the extent to which those domains are phenotypically independent is an unanswered and important question. The identification of 'endophenotypes' of the autistic syndrome may be very useful for genetic and neurobiologic studies of autism, but only if(More)
This research explored the ability of parent-informant Personality Inventory for Children (PIC; Lachar, 1982) questionnaire items to form the foundation for self-report scales. An iterative rational and internal consistency approach using 585 clinical protocols constructed nine nonoverlapping clinical scales. Twenty-four complementary subscales were also(More)
Response sets as well as cognitive and academic deficits compromise the validity of child and adolescent self-report of emotional adjustment. Three studies using clinical and asymptomatic samples of 4th to 12th grade students detail applications of the four validity scales of the Personality Inventory for Youth (PIY), namely, (a) Validity (VAL) a scale of(More)
In this study we examined the comparability of the Personality Inventory for Youth (PIY; Lachar & Gruber, 1993, 1995)--Spanish version to its English counterpart among bilingual Mexican American male and female high school students (n = 120), and among incarcerated bilingual Mexican American male adolescents (n = 52). Results indicated that language(More)
  • 1