Textbook Notes (368,117)
Canada (161,660)
Psychology (4,889)
Chapter 4

Chapter 4 .doc

5 Pages
Unlock Document

Psychology 2080A/B
Doug Hazlewood

Chapter 4 September 19 · Domain sampling: · Time sample: what happens on certain occasions · Internal consistency: are you testing only the one thing you think are test- ing (a psychology test may turn into a reading test if the questions are diffi- cult) · Reliability- the thing we are interested in is not directly observable · Ability is not observable we INFER it from behavior · Behavior is not transparent we cannot look at it and see your ability · O= matter of fact we can observe it · T= thing we are really interested in · E= always present can be positive or negative · Fundamental principle: the more error there is in your measurements the less reliable those measurements are · Error of measurement is something’s negative and sometimes positive (e.g not enough sleep, too much noise) · The more error there is in the measurement the more distance between scores · Error in measurements take away from reliability because it allows for more accounts of how you do on the same test · True score would be obtained if there were NO error of measurement · If we test someone too many times the errors will cancel each other out that tells us the mean is close to the true score · Sarah’s true score is completely independent from the words we choose · O=t+ei (ei, e2, e3) errors will be different on all testing occasions Domain sampling error: error due to items on the test · Suppose no questions were asked about a certain chapter suppose to be on the test than your score would not represent that certain chapter. You would spend time studying a chapter not included in the test oppose to spending time studying chapters that WILL be on the test · Exam score may vary depending on what’s included or dis cluded from the exam · Solution increase the number of questions on the text to be able to cover the whole knowledge base · Parallel forms of reliability: choosing two different sets if test items cover- ing the same material and same difficulty· If the correlation between scores on 2 parallel forms is low than we have domain sampling error Time sampling error: error due to testing occasions · High correlations mean less influence of bad or good days · Test retest approach: useful for characteristics that don’t change over time · Carryover: first testing sessions influences scores on the next session · Practice: when carryover
More Less

Related notes for Psychology 2080A/B

Log In


Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.