By Jenifer Larson-Hall
This invaluable booklet exhibits moment language researchers the right way to use the statistical software SPSS to behavior statistical exams often performed in SLA study. utilizing info units from genuine SLA reviews, A advisor to Doing statistics in moment Language learn utilizing SPSS exhibits rookies to either information and SPSS tips to generate descriptive statistics, tips to select a statistical try out, and the way to behavior and interpret quite a few uncomplicated statistical checks. It covers the statistical checks which are most ordinarily utilized in moment language study, together with chi-square, t-tests, correlation, a number of regression, ANOVA and non-parametric analogs to those exams. The textual content is amply illustrated with graphs and tables depicting genuine info units, and workouts through the booklet support readers comprehend recommendations (such because the distinction among self sustaining and based variables) and figure out statistical analyses. solutions to all routines are supplied at the book’s spouse web site, besides pattern info units and different supplementary fabric.
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Extra resources for A Guide to Doing Statistical Analysis in Second Language Research Using SPSS (Second Language Acquisition Research Series)
Some children who participated in the vocabulary test achieved very high scores on the pre-test. Children with such high scores would not be able to achieve many gains on a post-test, and one might then have a principled reason for cutting them out of the analysis (although you should tell your readers that you did this). To cut out some of the rows of the data set in SPSS, go to the DATA > SELECT CASES line. 17. First choose the variable that will be used to specify which cases to delete. For the Obarow data we want to exclude children whose pre-test scores were too high, so I’ll choose the PRETEST 1 variable.
You may have to try to experiment with the Text Import Wizard to get the SPSS file to come out looking good. Create a simple output by going to ANALYZE > DESCRIPTIVE STATISTICS > FREQUENCIES and moving one variable to the “Variable(s)” box. Press OK to continue. Now you have both a Data Editor and an SPSS Viewer open. Save both of them. 2 Manipulating Variables It is likely that you will want to manipulate your variables at some point after entering them. For example, you may have entered the scores from three subtests of one test and then want to combine these scores for a total score.
Generally you will not want the AUTOMATIC RECODE . However, for the other two choices, if you choose RECODE INTO SAME VARIABLES , you will rewrite your previous variable and it will be gone, whereas if you choose RECODE INTO DIFFERENT VARIABLES then your original categories will still be visible. This latter choice is probably the safest one to make when you are new to SPSS. If you create your new group and are then sure you do not need the old category, you can always delete it (right-click and then choose CLEAR ).