[Psychometric properties of the Addenbrooke's Cognitive Examination III (ACE-III) for the detection of dementia].

Background: The Addenbrooke's Cognitive Examination III (ACE-III) is widely used for evaluation of dementia.

Aim: To assess the psychometric properties of ACE-III, analyzing its factor structure, its reliability (from an Item Response Theory [TRI] model) and its diagnostic usefulness.

Material And Methods: We studied 1101 older people without cognitive impairment and 63 currently having a diagnosis and receiving treatment for dementia.

The mediating role of self-esteem on the relationship between perceived discrimination and mental health in South American immigrants in Chile.

Psychological aspects in South-South migration have been little studied. The following study aimed to describe the effect of individual self-esteem as a mediator in the relationship between perceived discrimination and mental health (understood as the presence of anxious and depressive symptomatology) in South American migrants in Chile. We surveyed 853 people, of Peruvian and Colombian nationality, residing in three cities (Arica, Antofagasta and Santiago).

[Factor analysis of ipsative data: a simulation study].

This paper introduces a summary on how to proceed to conduct a factor analysis when the input data are ipsative. The classical factor analysis procedures cannot be used because the covariance matrix is singular. Additionally, previous research on the optimal conditions to conduct factor analysis for ipsatized data is reviewed, and the results of a simulation study are presented.