Chapter 1 the study of collocations

Table 13.  Post-hoc comparisons for the dependent variable: Target-Like Use 
of Articles 
Comparison 
Mean Diff. 
Fisher PLSD  Scheffe F-test  Dunnett t 
Group 1 vs. Group 2  -152.815 
73.324* 
8.419* 
4.103 
Group 1 vs. Group 3  -297.831 
74.122* 
31.295* 
7.911 
Group 2 vs. Group 3  -145.016 
73.531* 
7.539* 
3.883 
* Significant at .05 level 
 
Table 14.  Means and standard deviations for the dependent variable: Target-
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GROUP COUNT MEAN STD. 
DEV. 
Group 1 
91 
54.879 
32.479 
Group 2 
94 
70.160 
23.117 
Group 3 
90 
84.662 
18.292 
 
4.1.5  Lexical Density 
 
The ANOVA for the dependent variable Lexical Density shows a 
significant main effect for the factor Group (F(2, 272) = 23.642, p = .0001).  To 
examine the source of the significant main effect, post-hoc comparisons of the 
means for each group were performed.  The results of the comparisons are 
illustrated in Table 15.  There is a significant difference between all groups at 
the p < .05 level of significance.  The table of means, Table 16, shows that there 
is a steady decrease in Lexical Density from Group 1 to Group 3.  The reason 
for this drop is made clear in the light of the further analyses performed.