The Perceptual Maze Test Revisited: Evaluating the Difficulty of Automatically Generated Mazes.

The Elithorn perceptual maze test is widely used in clinical research and practice. However, there is little evidence of its psychometric properties, and its application is limited by the technical difficulty of developing more mazes. The current research aims to adopt a rigorous approach to evaluate 18 mazes that were automatically generated by a novel R software package.

Continuity in sex-typed behavior from preschool to adolescence: a longitudinal population study of boys and girls aged 3-13 years.

Sex-typed behavior was assessed at age 3 using the Pre-School Activities Inventory, and at age 13 using the Multidimensional Gender Identity Scale, in 54 masculine boys, 57 masculine girls, 75 feminine boys, 65 feminine girls, 61 control boys, and 65 control girls. At age 13, girls who had been masculine at age 3 felt less similar to other girls, were less content being a girl, and had greater self-efficacy for male-typed activities than control girls, and girls who had been feminine at age 3 had greater self-efficacy for female-typed activities. Boys who had been feminine at age 3 felt less similar to other boys and had lower self-efficacy for male-typed activities than control boys at age 13, and boys who had been masculine at age 3 felt more competent in agentic roles.

Developmental trajectories of sex-typed behavior in boys and girls: a longitudinal general population study of children aged 2.5-8 years.

The stability of sex-typed behavior from the preschool to the middle school years was examined. The Preschool Activities Inventory, a measure of within-sex variation in sex-typed behavior, was completed by the primary caregiver when the child was 2.5, 3.

Psychological assessment of mothers and their assisted reproduction triplets at age 3 years.

The aim of this study was to examine the psychological well-being of mothers and the psychological development of their 3-year-old triplet children conceived by in-vitro fertilization (IVF)/intracytoplasmic sperm injection (ICSI). Comparisons were carried out between a sample of 10 families with IVF/ICSI triplets and matched groups of 15 families with IVF/ICSI twins and 30 families with IVF/ICSI singletons. The families were recruited from Follow-Up, a national organization in France that was established to study children conceived by assisted reproduction.

Development and validation of a new screening tool for hypoactive sexual desire disorder: The Brief Profile of Female Sexual Function (B-PFSF).

Aim: To develop a screening tool to allow a postmenopausal woman to determine whether to seek evaluation for hypoactive sexual desire disorder (HSDD).

Methods: The Brief Profile of Female Sexual Function (B-PFSF) was developed using items from the Profile of Female Sexual Function (PFSF) and the Personal Distress Scale (PDS). Logistic regression analysis was used to select items best able to discriminate between women with HSDD (n = 743) and controls (n = 226) and a screening cut-off score was identified.

Behavioral and cognitive development as well as family functioning of twins conceived by assisted reproduction: findings from a large population study.

Objective: To establish the nature and extent of difficulties in parenting and child development in families with twins conceived by assisted reproduction.

Design: Comparisons were carried out between a representative sample of 344 families with 2- to 5-year-old twins conceived by IVF/intracytoplasmic sperm injection (ICSI) and a matched comparison group of 344 families with singletons from IVF/ICSI. One twin was randomly selected for data analysis to avoid the bias associated with nonindependence of measures.

Genetic and environmental influences on sex-typed behavior during the preschool years.

The genetic and environmental etiologies of sex-typed behavior were examined during the preschool years in a sample of 3,990 three- to four-year-old twin and non-twin sibling pairs. Results showed moderate genetic and significant shared environmental influence for boys and substantial genetic and moderate shared environmental influence for girls. For both boys and girls, twin-specific shared environmental effects contributed to twins' similarity in gender role behavior and accounted for approximately 22% of the shared environmental variance.

Parenting infants conceived by gamete donation.

In recent years, concerns have been raised regarding the potentially negative consequences of gamete donation for parent-child relationships. Findings are presented of a study of families with an infant conceived by gamete donation. Fifty donor insemination families and 51 egg donation families were compared with 80 natural conception families on standardized interview and questionnaire measures of the psychological well-being of the parents, the quality of parent-child relationships, and infant temperament.

Profile of Female Sexual Function: a patient-based, international, psychometric instrument for the assessment of hypoactive sexual desire in oophorectomized women.

Objective: The purpose of this study was to develop a self-administered, patient-based questionnaire to assess loss of sexual desire and associated symptoms in postmenopausal women with hypoactive sexual desire disorder (HSDD) experiencing distress.

Design: Preliminary items and domains of sexual function were identified through individual and focus group interviews with postmenopausal women in the United States and Europe. A subset of items was selected for translation and further analysis.

Testosterone during pregnancy and gender role behavior of preschool children: a longitudinal, population study.

Levels of testosterone (T) and sex hormone-binding globulin (SHBG) were measured in blood samples from pregnant women and related to gender role behavior in 342 male and 337 female offspring at the age of 3.5 years. Gender role behavior was assessed using the Pre-School Activities Inventory, a standardized measure on which a parent indicates the child's involvement with sex-typical toys, games, and activities.

Prenatal stress and gender role behavior in girls and boys: a longitudinal, population study.

Prenatal stress influences neural and behavioral sexual differentiation in rodents. Male offspring of stressed pregnancies show reduced masculine-typical characteristics and increased feminine-typical characteristics, whereas female offspring show the opposite pattern, reduced feminine-typical and increased masculine-typical characteristics. These outcomes resemble those seen following manipulations of gonadal hormones and are thought to occur because stress influences these hormones during critical periods of development.