WhatisMultilevelorHierarchicalLinearModeling.ppt

Multilevel Modeling 1. Overview 2. Application #1: Growth Modeling Break 3. Application # 2: Individuals Nested Within Groups 4. Questions? Overview What is multilevel modeling? Examples of multilevel data structures Brief history Current applications Why multilevel modeling? What types of studies use multilevel modeling? Computer Programs (HLM 6 SAS Mixed Resources What is Multilevel or Hierarchical Linear Modeling? Nested Data Structures Several Types of Nesting 1. Individuals Nested Within Groups Individuals Undivided Individuals Nested Within Groups … and Further Nested Examples of Multilevel Data Structures Neighborhoods are nested within communities Families are nested within neighborhoods Children are nested within families Examples of Multilevel Data Structures Schools are nested within districts Classes are nested within schools Students are nested within classes Multilevel Data Structures Level 4 District (l) Level 3 School (k) Level 2 Class (j) Level 1 Student (i) 2nd Type of Nesting Repeated Measures Nested Within Individuals Focus = Change or Growth Time Points Nested Within Individuals Repeated Measures Nested Within Individuals Carlos Day Energy Level Monday = 0 98 Tuesday = 1 90 Wednes. = 2 85 Thursday = 3 72 Friday = 4 70 Repeated Measures Nested Within Individuals Repeated Measures Nested Within Individuals Changes for 5 Individuals 3rd Type of Nesting (similar to the 2nd) Repeated Measures Nested Within Individuals Focus is not on change Focus in on relationships between variables within an individual Repeated Measures Nested Within Individuals Carlos Day Hours of Sleep Energy Level Monday 9 98 Tuesday 8 90 Wednesday 8 85 Thursday 6 72 Friday 7 70 Repeated Measures Nested Within Individuals (Not Change) Repeated Measures Nested Within Individuals (Not Change) Repeated Measures Nested Within Individuals Repeated Measures Within Persons Le