24 the participants that the researcher studied. Ary et al. 2010 state that the
stratified sampling is used to the population which is consists of a number of subgroups or strata p. 153.
B. Research Setting
This research was conducted in Campus II Sanata Dharma University, Mrican,Yogyakarta. The researcher collected the video of the particip
ants‟ performances in the Public Speaking Class from the Public Speaking lecturer.
After getting the videos of the participants, the researcher conducted the process analysis. The researcher avoided the noisy places because they could disturb the
process of video analysis. The processes of analyzing those videos were conducted from April until September 2014.
C. Research Participants
The participants of this research were eight students of the English Language Education Study Program from batch 2011 who had taken the Public
Speaking Class. The researcher focused on the students who had taken the Public Speaking Class because they were learning to deliver speech in the Public
Speaking Class. This research used samples to get the data. This research used data
sampling to limit the number of participants. Considering the limit of time, the researcher used stratified sampling.
Ary et al. 2010 state the stratified sampling is used to the population which is consists of a number of subgroups or strata p.
25 153. In this research, the researcher divided the participants into two groups. The
first group contained the participants who had the high level skill in delivering a speech. Then the second group contained participants who had the low level skill
in delivering a speech. The characteristics of the high level group were fluent, good pronunciation, good eye contact and clear sound. The characteristics of the
low level group were fluent less, a lot of mistakes in pronunciation, bad eye contact. The performances of all students were recorded and then the researcher
selected several videos. The selected videos were the data sampling. The criteria of the videos are 1 it has clear sound; 2 there is not much noise, and 3 it has a
complete speech.
D. Instrument and Data Gathering Technique
In this research, the researcher gathered the data from the public speaking videos. The videos were about the performances of the students in delivering
speech. The videos were the final exam of public speaking. The researcher used some instruments to gather the data. Those instruments were the human
instruments and the documents.
1. Human Instruments
According to Ary et al 2010, the human is the primary instrument for the gathering and analyzing of data p. 424. Here, the researcher is the primary
instrument of this study. The researcher actively collected and analyzed the data.
