LCSW Exam Prep Practice Evaluation /Research Questions And Answers 2 major purposes of research design 1. to provide answers to research questions 2. to control variance, insuring that the results obtained are as closely related to what is being studied Maximin on Principal Maximize the variance of the variables of the substantive research hypothesis (i.e., you want the experimental conditions to be as different as possible); to Control extraneous variables (i.e., these are independent variables that are not necessarily related to your study, (e.g., sex, race); and Minimize error variance (i.e., this is the fluctuation that may occur in your results due to random events). Variable any phenomena or characteristic that is free to vary with at least two conditions or levels (e.g., gender with both males and females is a variable; males alone would be a constant) Constant restricted to a single state (e.g., gender is a constant if females only are used in a study -not both sexes) Independent Variable presumed cause Dependent Variable presumed effect and vary as related to the independent variable, usually the treatment being tested is the independent variable Hypothesis a proposition that is stated in a testable form Null Hypothesis referred to as the hypothesis of "no difference," generally used in statistcal analysis to be disproved Random Sample briefly stated, it is a planned process that utilizes probability theory to ensure that the sample will represent the population, in the random sample each subject in the population has an equal chance of being selected
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Labtech. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $9.99. You're not tied to anything after your purchase.