2.1.4. The Ex Post Facto Design
The ex post facto method may be implemented through
two different designs. The one that fits this study is referred to as the
criterion group study. The design of this type of research (see figure
1) consists in choosing two groups of subjects (G1 and G2). The dependent
variable(s) should be present in one group and absent from the other. Of
course, in the case of this investigation, we should talk about the degree
of presence rather than absolute presence or absence of the dependent
variable. Then the groups are compared in terms of the hypothesised independent
variable(s) (X), which had already occurred.
Figurel: The ex post fact
design adapted from" (Cohen & Manion, 1980).
This type of design is said to bridge "the gap between
descriptive research methods on the one hand and true experimental research on
the other" (Cohen & Manion, 1980, p. 144). Lack of manipulation of
variables makes it belong to the range of descriptive methods, while the fact
of choosing, observing and comparing two groups of subjects makes it seem like
an experiment.
2.1.5. Sampang
The participants of this experiment were third year
Translation students of Batna University. We have chosen third year and not
second or first because we assumed that they should have attained a relatively
advanced stage in the learning process. This advanced stage represents the
dependent variable of the study. In addition, we have chosen third and not
fourth year students because there exists no fourth year students in Batna
Translation Department. The third year students represent the first class in
this newly founded department.
Our sampling technique was based, as already explained, on
the assumed "presence" and "absence" of the dependent variable. In other words,
two groups have been chosen. Students who obtained the highest grades on the
le semester exam of Arabic-English-Arabic translation
constituted the le group. Those who obtained the
lowest grades constituted the rd group.
The number of third year students is 141. The sample was
formed with 44 students, which represents 31% of the population. Each group
contained 22 students. As our sampling was based upon a specific criterion,
control over other types of criteria, like sex and age was limited.
Nevertheless, sex proportions were respected as much as possible. This is
explained in the following table.
Table 1: Gender proportions in the
ex post facto sample
Group10 Population Group 1 Group 2
Caegory N. % N. % N.
Male
|
45
|
31%
|
8
|
36%
|
5
|
23%
|
Female
|
96
|
69%
|
14
|
64%
|
17
|
77%
|
Total
|
141
|
100%
|
22
|
100%
|
22
|
100%
|
|
For the specific purpose of this study, most importance was
given to prior knowledge regardless of its sources. Therefore, the students'
academic background and age are not variables this study needs to control.
Indeed these variables might contribute to their subjects' knowledge.
|