Lecture 2_ theories, hypotheses, and predictions .pdf - PSY 10A Research Methods Lecture 2 Theories Hypotheses and Predictions Instructor Spencer

Lecture 2_ theories, hypotheses, and predictions .pdf - PSY...

This preview shows page 1 - 4 out of 9 pages.

6/24/19 1 PSY 10A: Research Methods Instructor: Spencer Mermelstein Department of Psychological and Brain Sciences Lecture 2: Theories, Hypotheses, and Predictions Reflection questions What is empiricism? What are features of good scientific explanations? The scientific method Theory Hypotheses Empirical tests (e.g., experiments) Observations (data) Present results (articles) Re-evaluate theory observations non biased must be testable falsibh Valid coherent inflight poisonous
Image of page 1
6/24/19 2 Scientific Laws and theories Law : universally true statements Not very many in science, and rare in psychology (why?) Usually mathematically formalized Theory : interrelated set of concepts that coherently explain and describe a body of evidence, and must generate novel hypotheses Often, in psychology, are verbally stated Models : often mathematical formalizations of theories Composed of abstract theoretical constructs Theory Describe Explain Predict Hypotheses and predictions Theories must be productive : generate testable and falsifiable hypotheses Hypotheses : a claim about the state of the world derived from a theory. It is not a question, but rather a statement. Contain operational definitions : specific, observable phenomena that can be measured à how we translate theoretical constructs into measurable quantities State the expected relationship between different variables à predictions scientific low law of gravity rn more complex can't simplify to universally the statement psymfh theory is dcufifdoes.net make claim concerned good story must do tm he careful what more experimental the hlfmurayd include performance is copectd to be compare.si on to other group
Image of page 2
6/24/19 3 Operational definitions The translation of theoretical constructs into measurable observations Consider Depression as a theoretical construct that we must infer through observations A state of “low mood” How to measure?
Image of page 3
Image of page 4

You've reached the end of your free preview.

Want to read all 9 pages?

  • Spring '17
  • Vanessa Woods
  • • Buss

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture