Internal validity is important because it determines... If the Hawthorne effect affected the findings Whether study findings are a result of measurement effects Whether the independent variable caused the change in the dependent variable If the study is generalizable to the larger population

Which of the following statements is true of the relationship between sample sizes and effect sizes?   The larger the true difference, the larger the sample size required to demonstrate superiority   Small studies that ask the same research question are more likely to vary in their estimate of the between-group difference than large studies   There is no relationship between effect size and sample size    The bigger the expected effect, the bigger the required sample size

Read the research article added here and answer the question: 1. Looking at the relationship between conception risk status and shirt color, what type of study is it (correlational, quasi-experimental, experimental)? Group of answer choices A. Quasi-experimental and experimental B. Quasi-experimental C. Correlational D. Experimental

WHAT IS THE NULL HYPOTHESIS OF A CHI-SQUARED TEST? • WHAT DO YOU DO IF THE P- ● VALUE IS EXACTLY 0.05? ●

Chart 2. Levels of evidence (ASHA, 2004) Level Description la Well-designed meta-analysis of more than one randomized controlled trial lb lla llb III IV Well-designed randomized controlled study Well-designed controlled study without randomization Well-designed quasi-experimental study Well-designed non-experimental studies, i.e., correlational and case studies Expert committee report, consensus conference, clinical experience of respected authorities Match the types of study with their ranking level. Randomized control trial Cohort study Cross-sectional study Case-control study Single subject design (time series) Single case study [Choose ] Level 3 ✓ Level 2 Level 1 Level 2 Level 3 [Choose] [Choose ] [Choose ]