Random or Nonrandom Methods
Sampling Method? Random or Nonrandom?
A student organization looking to get signatures for a petition hang out in front of UCOM to recruit.
Convenience sampling
Nonrandom
What is reliability?
The consistency or stability of scores
Sampling Method? Random or Nonrandom?
We recruit students in PSY220 and then have them recruit their same-age friends.
Snowball Sampling
Non Random
Sampling Method? Random or Nonrandom?
Select twenty students from a class to receive ice cream by using randomizer.org to identify the twenty names randomly
Simple Random Sampling
Name the type of construct reliability
Established patients at Dr. Brennan's specialty practice for adults with ADHD are given the TOVA test once their medication is at ideal performance. One month later, the patients are given the TOVA test again. Patients' scores on both administrations of the test were strongly correlated.
Test-Retest Reliability
Identify the (a)income parameter, (b) income statistic, and (c) income sampling error for the following:
The mean income of all subscribers to a particular magazine is $26000. We draw a sample of 100 subscribers and find that their mean income is $27300.
(a) $26000
(b) $27300
(c) $1300
Sampling Method? Random or Nonrandom?
We have 400 PSY majors at USA and we want to sample 100 of them. We randomly select a number between 1 and 4. The number 2. Starting with person 2, we select every 4th person in the sampling frame (i.e., 2,6,10,14,18).
Systematic Sampling
Random
Name this type of construct reliability.
Prospective law students often take the LSAT multiple times. Although each test measures the same thing, the students will never get the exact same questions.
Equivalent forms reliability
A measure must be _____ in order to be _____, but a _____ measure is not necessarily ______.
reliable
valid
reliable
valid
Sampling Method? Random or Nonrandom?
To measure attitudes of PSY220 students, we randomly select three PSY220 classes and then randomly select five students from those three classes.
Two-Stage Cluster Random Sampling
Name this type of construct reliability.
A hotel manager wants to measure overall satisfaction among customers, so they send out a survey. The survey consists of the following questions, to which customers can respond strongly disagree, disagree, neutral, agree, or strongly agree.
1. I was satisfied with my experience.
2. I would recommend your hotel to family and friends.
3. I would visit this hotel again at some point in the future.
Customers that were highly satisfied with their experience were also highly likely to recommend the hotel to family and friends and were highly likely to visit the hotel again at some point in the future.
Internal Consistency Reliability
Sampling Method? Random or Nonrandom?
Our Class is 60 % female, so to sample 10 students from our class, we randomly select 6 women and 4 men.
Stratified Random Sampling
Name this type of construct reliability.
Two observers count how many times children push each other over a certain duration of time.
Interrater Reliability