INVESTIGATING THE CORRELATION BETWEEN CRITICAL THINKING ABILITY AND GRADE ELEVEN STUDENTS’ VOCABULARY ACHIEVEMENT
Abstract
This research entitled “Investigat ing The Correlation Between Critical
Thinking Ability and Grade Eleven Students’ Vocabulary Achievement at SMK
Bhakti Persada Bekasi” principally aims to investigate whether or not there is
correlation between critical thinking ability and vocabulary achievement.This
research was conducted on the grade eleven students at SMK Bhakti Persada,
PondokGede, Bekasi, at in the Academic year of 2016/2017. Research methode
used in this research was correlation, quantitative and the design was ex-post facto
design.To collect data the researcher used two instruments in the form of
objective, multiple choice each numbering 30 for X variable and 32 for Y variable
out of 50 question items for X and also 50 items for Y having been tried out in
class XI at SMK Bhakti Persada, Pondokgede, Bekasi. The scores obtained from
the try-out class were used to analyze the validity, reliability, discrimination
power and difficulty index of each question item in two instruments.The
population of this research was grade eleven students consisting of 212 students
occupying 7 classes. The number of samples was 37 students seating in
accounting class taken from the population using cluster random technique. The
results obtained from samples were used to analyze the data using statistical
formulas of Pearson’s Product Moment, preceded by normality and linearity test
as the pre-requisite requirements for data analysis.The analysis using SPSS-based
Product Moment formula produced significance (Sig.) value of 0.000. Since the
significance value was smaller than (<) Alpha 0.05, Ho is rejected and Ha is
accepted. Accordingly the research concludes that there is significant correlation
between critical thinking ability and grade eleven students’ vocabulary
achievement at SMK Bhakti Persada Bekasi in the Academic Year of 2016/2017.
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