PSYC3070: Statistics for the Behavioral Sciences

Lab this week will focus on using spss to calculate oneway independent and repeated measures ANOVA. We will also be focusing on post-hoc tests and interpretation. The lab directions, as always, can be found on the content page.

Share your conclusions here as comments. (Then start reading chapter 12).

The following things are what I’m thinking about doing today, no particular order yet. I believe this is a necessary evil to get us through the semester in an efficient way.

• Organizing the classroom and work groups.
• Intro to macbooks and OS X.
• Getting on the internet and saving to your network space.
• Finding programs/files/organization
• Creating your own user account.
• Keyboard and mouse differences from a Microsoft OS
• How SPSS works.
• Let’s work through the tutorial… this will get us ready to import data.

Let’s plan on going over our homework tomorrow, we’ll do it (if applicable in SPSS). You should find a handout for Independent and Dependent problems on the content page or in the podcast.

See you all tomorrow… hopefully prepared to get some work one this time.

At this time I’d like to see us take the test on Tuesday. There is no reason we shouldn’t be ready.

Do the following two problems as both independent and dependent designs… You may need to use a little imagination to get the context right, but I believe those of you that have been in class with me can do it!

Ten politically active individuals are selected, all of whom label themselves as liberal. Each is attached to a physiograph, and heart rate is recorded while a sequence of 20 slides is projected on a screen at which the participant is looking. Half of the slides are pictures of famous individuals without any expressed political philosophy; the other half are known conservatives. The arrangement of the slides is random. Each participant receives two scores: The first is the average heart rate during exposure to the neutral slides, and the second is the average heart rate during exposure to the conservative slides. The data are shown here. Does reaction to the slides differ?

Neutral Conservative
65.3       71.8
75.7       73.5
85.6       99.3
73.7       81.7
69.5       75.7
68.2       73.5
70.1       79.8
72.5       70.3
71.0       85.3
83.5       107.1

Thirty-two students are randomly selected from a large introductory class and are randomly and evenly assigned to one of two groups. Each participant is given four 15-second exposures to a list of 15 nouns. After 30 minutes, each participant in one group is given a free recall test, whereas each participant in the other group is given a recognition test. The results in terms of the number of words correctly retained are shown here. Compare the groups. (The data is shared using frequency counts. Makes sure everything adds up as N is reported in thE first part of the problem statement.)

Recognition     Recall

X    f                X    f

15  6               4   1
14  1               2   5
13  4               1   7
12  2               0   3
10  1
8    1
6    1

you should be finishing up your HW from the book on chapters 1, 2, 5, 6, and 8. Additionally, you should complete the extra descriptive HW. On Tuesday we will try to import some data and solve your descriptive HW using SPSS.

Be sure and visit the Library to go over the SPSS tutorial… the first 4 will take you a very long way.

Here’s the HW we worked on together the last tiem we got together. Make sure your HW is correct by checking these numbers. If you were there then you’ll know what HW goes with what output… or just check the labels.

this link goes to my website… if the SPSS output looks funny try a differnt browser, SPSS created the HTML code.

Here is the output we created together last week in SPSS.

Use it to check your HW solutions and review where the relevant data is found.

This will only stay up for a while, so this link will be dead at the end of the semester:

Let’s see if we can get this to download:

http://radar.ngcsu.edu/~clrobertson/links/ANOVA_HW.sav

Scholars,

Catherine Ashley and Ashley Marascalco are doing some research that allows you to get some great experience and practice using SPSS and engage in hypothesis testing.

The study will take about an hour. You can sign-up to participate in the psychology lab foyer (1st floor Dunlap Hall).

This is a great opportunity for you to do 2 positive things. 1). Help your peers collect some data and present at a conference (this makes your diploma more valuable). 2). Get some extra practice on problems and tools that we are covering in class. We will have a variety of t-tests on the final exam and we will continue to use SPSS software.

If you have any questions you should contact the researchers (Catherine or Ashley). I’ll have them put their contact info up on the sign-up board in the lab foyer.

Scholars,

Today (Monday) and tomorrow (Tuesday) we will be using SPSS. Bring your old exam #2, we’ll work those problems. We’ll also do some ANOVA if time allows.

Additionally, bring your calendars. Ashley and Catherine are working on a research project and you have an opportunity to both help your peers and learn more about t-tests and SPSS by participating.