Inventory-Description

The MDI is a questionnaire that includes various dimensions related to adult development in midlife, aiming to examine the biopsychosocial aspects of life. Specifically, it assesses:
Physical health: Evaluates perceived physical condition and physical symptoms.
Psychological development: Measures mental well-being, resilience, and sense of purpose in life.
Social relationships: Examines the quality of relationships with family, friends, and the broader community, as well as the social support received.
The MDI is a multidimensional tool that examines midlife through the dynamic interaction between health, mental well-being, and social interaction.

Data Analysis and Usage

Data from the MDI are collected through questionnaires and can be used to analyze the factors affecting the lives of individuals in midlife. Data usage includes:
Factor analysis to identify the main dimensions concerning physical, psychological, and social development.
Correlation analysis to understand the relationship between different dimensions, such as how psychological well-being affects physical health.
Multiple regression to analyze the impact of different factors on the overall quality of life for individuals in midlife.
Data can be used to enhance the understanding of the challenges faced by middle-aged individuals, such as physical problems, changes in relationships, and the need for psychological stability.

Purpose

The goal of the Midlife Development Inventory (MDI) is to assess the overall condition of individuals in midlife, considering physical, psychological, and social aspects. The purpose is to understand how changes in midlife affect physical health, mental well-being, and social relationships, as well as how interventions can be improved to support individuals during this critical life phase.
The MDI is often used for:
Assessing adaptability in midlife.
Examining the impact of social, economic, and cultural factors on the lives of middle-aged individuals.
Developing support strategies to improve the quality of life for middle-aged adults.

Calibration

The calibration of the MDI includes:
Reliability analysis, such as calculating Cronbach’s alpha, to ensure internal consistency of the scale.
Confirmatory factor analysis to assess the validity of the dimensions evaluated by the MDI.
Cross-validation with different populations to verify whether the scale is reliable and applicable to diverse samples of middle-aged individuals.

Bibliography

Lachman, M. E., & Weaver, S. L. (1997). The Midlife Development Inventory (MIDI) Personality Scales: Scale construction and scoring. Brandeis University.
Lachman, M. E. (2004). Development in midlife. Annual Review of Psychology, 55(1), 305-331.
Brim, O. G., Ryff, C. D., & Kessler, R. C. (Eds.). (2004). How healthy are we?: A national study of well-being at midlife. University of Chicago Press.