Statistical Methods for Psychology

This model is multiplicative rather than additive and doesn’t look much like the analysis of variance model.^4 But if you recall ...

serious alternative to the saturated model. But the approach will be very useful when we come to more complex designs. From Tabl ...

the design of the experiment, which deliberately placed nearly equal numbers of observa- tions in the two levels of Fault. The i ...

Differences Between Log-Linear Models and the Analysis of Variance Although I have frequently compared the analysis of variance ...

Looking at our original data in Table 17.1, we note that in the low fault condition 153 people were found guilty and 24 were fou ...

Now recall that when we calculated treatment effects in the analysis of variance we took deviations of means around the grand me ...

Assumptions One of the pleasant things about log-linear models is the relative absence of assumptions. Like the more traditional ...

One of the convenient things about hierarchical designs is that they allow us to specify models very clearly and simply. Assume ...

Can the pattern of cell frequencies be explained by differences in the number of people judged Guilty and Not guilty? Can the p ...

Examining the Saturated Model In considering two-way tables, we defined a saturated model as one that includes all possi- ble ef ...

17.7 Deriving Models The saturated model is certainly not the only possible model that would fit these data, and we are going to ...

are again specified by their “generating class” or “defining set“, meaning that if there are interactions the main effects are a ...

the table and compare the MF, MV, FVmodel with each of the models that include two- way interactions. If we compare chi-square f ...

From Exhibit 17.4 you can see that the program begins with the saturated model. It then considers what would happen if each of t ...

a change in chi-square of 2.556 on 2 df, which is not significant. This leaves us with the more optimal model of (Verdict 3 Faul ...

Because there are only 2 dffor Moral, there is no dummy variable corresponding to the last level of Moral. (Remember, all of thi ...

frequencies. This test is easy to compute because the standard error of a residual is simply the square root of the expected fre ...

Exercises 655 Exercises All of the problems in this chapter will require solution by one or more computer programs. My answers i ...

656 Chapter 17 Log-Linear Analysis Motor Vehicle Helmet Injury Count No Ye s 2 0 No 195 Old Ye s Ye s Ye s 2 No 17 No Ye s 4 2 N ...

Exercises 657 This chapter was based heavily on a study by Pugh (1983) on the blaming-the-victim phe- nomenon in rape cases. The ...