Statistical Methods for Psychology

the error rate most commonly associated with them, the kinds of comparisons they are pri- marily designed to test, and the type ...

12.9 Computer Solutions 399 12.9 Computer Solutions Most software packages will perform multiple comparison procedures, but not ...

400 Chapter 12 Multiple Comparisons Among Treatment Means Data Siegel; Infile ‘Alexander:SAS610:Data Files:Siegel.dat’; Input Co ...

12.9 Computer Solutions 401 Means with the same letter are not significantly different. REGWQ Grouping Mean N CONDTION A 29.000 ...

SAS will also produce a number of other multiple comparison tests, including the Bonferroni and the Dunn-Sˇidák. I do not show t ...

Boring is Attractive A useful example of trend analysis comes from a study by Langlois and Roggman (1990), which examined the qu ...

That is not an ideal name for the independent variable, but neither I nor the study’s authors have a better suggestion. Within e ...

spaced values of the independent variable. The example will be simpler statistically if the units on the abscissa are evenly spa ...

In our case, Like all contrasts, this contrast has a single degree of freedom, and therefore . As you probably suspect from what ...

Because Ffor the residual is less than 1, we know automatically that it is not significant. This tells us that there is no signi ...

what would you have to say about the results? A linear or quadratic component would make some sense, but a quartic component cou ...

Exercises 409 Exercises 12.1 Assume that the data that follow represent the effects of food and/or water deprivation on behavior ...

410 Chapter 12 Multiple Comparisons Among Treatment Means 12.11 Calculate the Tukey test on the data in the example in Table 11. ...

Exercises 411 whether different doses would have different effects. Data that have been generated to loosely mimic the results o ...

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CHAPTER 13 Factorial Analysis of Variance CHAPTER 13 Factorial Analysis of Variance Objectives To discuss the analysis of varian ...

IN THE PREVIOUS TWO CHAPTERS, we dealt with a one-way analysis of variance in which we had only one independent variable. In thi ...

ran a one-way with young participants and then another one-way with old participants, we would need twice as many participants o ...

levels of Bis designated by b. Any combination of one level of Aand one level of Bis called a cell,and the number of observation ...

Section 13.1 An Extension of the Eysenck Study 417 Table 13.2 Data and computations for example from Eysenck (1974) (a) Data: Re ...