# Tutor profile: Hope W.

## Questions

### Subject: Psychology

I'm studying Bronfenbrenner's Ecological Systems Theory. What is the difference between a microsystem and a mesosystem?

Ecological Systems Theory highlights the role that various systems play in influencing child development. The microsystem is the web of interactions between the individual and the environments in which they engage in activities that fulfill an assigned or assumed role (e.g. as a daughter in a home, a student in the school, an employee in a workplace). A mesosystem is the interaction between the settings an individual operates within such as family, school, or peer groups, or as Bronfenbrenner says, “a mesosystem is a system of microsystems."

### Subject: Statistics

What is the difference between linear regression and multiple regression?

Regression analysis is used when you want to predict one variable from another; for example, if I wanted to know whether the number of days I worked in a year predicted my yearly income. Simple regression refers to a regression analysis with one independent variable (predictor) predicting one dependent variable (outcome), such as in the yearly income example. Multiple regression is used when there are two or more independent variables, such as if I wanted to determine whether my age and number of days worked predicted my yearly income.

### Subject: Statistics

I'm conducting a study and I want to know whether boys or girls perform differently on a test of math ability. What statistical test should I use?

Your study has one independent variable (gender) with two groups (boys and girls) and one dependent variable (the math test). Therefore, the appropriate statistical test for one independent variable with two levels and one dependent variable is a 2 independent samples t-test.

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