ANCOVA Analysis for Videogame Training and Divided Attention

PORTFOLIO

Table of Contents
EXERCISE 1...................................................................................................................................2
Reflection.........................................................................................................................................2
EXERCISE 2...................................................................................................................................4
Descriptive statistics........................................................................................................................4
Factorial ANOVA............................................................................................................................5
Recommendation.............................................................................................................................7
EXERCISE 3...................................................................................................................................9
A. ANCOVA Analysis................................................................................................................9
B. One-way ANOVA Analysis..................................................................................................12
MANOVA exercise.......................................................................................................................13
C. Descriptive statistics.............................................................................................................13
D. MANOVA Analysis.............................................................................................................14
E. Explanation............................................................................................................................15
EXERCISE-4.................................................................................................................................16
Introduction....................................................................................................................................16
METHOD......................................................................................................................................17
RESULTS......................................................................................................................................17
DISCUSSION................................................................................................................................19
REFERENCES..............................................................................................................................20
APPENDIX....................................................................................................................................21
APPENDIX-1............................................................................................................................21
APPENDIX-2............................................................................................................................24
APPENDIX-3............................................................................................................................27
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EXERCISE 1
Reflection
BPS code of ethics is a full fledged designed code of ethics which guide all the members of
British Psychological Society to carry out their professional conduct. These codes help
psychologists to ensure the ethical treatment of participants. In this reflection multiple studies
which are previously published will be used to show that how data from participants is gathered
without crossing boundaries of ethics.
There are major principles which help in best practice in ethics review; these four principles
include independence, competence, facilitation and transparency & accountability. The first
principle of independence states that the virtue of review of ethics must be independent from the
research itself so that any conflict of interest between researchers and the auditor who is
reviewing the ethics protocol must work between governed structures. This principle further adds
that the person who is investigating the ethics review protocol must be different and independent
from the investigator as by this way ethical conduct of a study can be ensured.
Another principle of BPS code of ethics is competence which states the ethics review
protocol of a research must be investigated by a competent body. The investigators who can form
this body of evaluating ethics review protocol must have proper expertise and must have a proper
training in this process. This principle has the agenda that every research must be checked by
competent reviewers so that ethical treatment of participants can be ensured.
Third principle of BPS codes of ethics is Facilitation; under this principle the review body of
ethics must facilitate the researcher to educate them about the ethical implications which their
research requires it imply. The vision of this principle is to invoke the responsibility of ethics
review body to educate and support the researchers.
The fourth and last principle of BPS code of ethics is transparency and accountability. This
principle states that the process of reviewing the ethical protocol of a study must be accountable
and open for scrutiny so that whenever any misleading ethics review can be undertaken it can be
appropriately located by the scrutiny process. This principle ensures transparent ethics review.
All the above principles of BPS code ensure informed consent, confidentiality, deception,
debriefing and right to withdraw elements in a research.
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It is important for investigators to follow all the BPS codes and principles to ethical conduct
their study. The study conducted by (Best, 2010) and (Repovš and Baddeley, 2006) are good
examples of studies which are undertaken by ensuring every principle of BPS codes. These
studies have asked for a consent from their participants and even have maintained anonymity
while presenting their results of the study. Few more examples of ethical investigations are
(Hafer and Begue, 2005) and (Koole, Greenberg and Pyszczynski, 2006); these studies have also
followed all ethical guidelines.
Out of the published studies stated above, there are few which also has some ethical
pitfalls. The study of (Hafer and Begue, 2005) has avoided the ethical pitfall of reward system
due to which the responses of participants could have become biased. These researchers should
have awareness of complexity of ethics which could have helped them in making better
judgements.
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EXERCISE 2
A study has been conducted to investigate the effect of reward on procrastination. The
participants of this study will be 60 undergraduate psychology students. These 60 students are
divided into two criterions or factors. The first criteria or variable is the level of reward; there are
three levels or values of this variable which are “no reward”, “small reward” and “large reward”.
The second factor or variable is the task emotion which has two level and those are “pleasant”
and “unpleasant”. All these variables are recorded under a SPSS datasheet which is intended to
be used to conduct Factor ANOVA. This technique of data analysis will help in determining the
impact of reward and emotional manipulation on the procrastination.
The 60 participants are provided with numerical math quizzes and then the data is recorded
based on the time in which each participant has completed their quiz. All the data will be used to
conduct factor ANOVA and to conclude the results.
Descriptive statistics
Descriptive statistics includes measures of central tendency and variance that helps in developing
the familiarity with a variable. In present investigation of procrastination, descriptive statistics of
three variables are summarized and the table of descriptive statistics is attached below including
the summary statistics of task emotion, reward and time.
Statistics
taskemotion Reward Time
N Valid 60 60 60
Missing 0 0 0
Mean 1.50 2.00 13.90
Median 1.50 2.00 14.00
Mode 1a 1a 14
Std. Deviation .504 .823 2.729
Variance .254 .678 7.447
Range 1 2 11
Minimum 1 1 9
Maximum 2 3 20
a. Multiple modes exist. The smallest value is shown
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Factorial ANOVA
Factor ANOVA is a two way ANOVA that allows to analyze the impact of two independent
variables on one dependent variable. In this case one dependent variable is “time” or what we
can call it procrastination. Besides this, the two independent variables are reward having three
values and emotion having two values. The entire Factorial ANOVA results gained from SPSS
output file are attached in APPENDIX-1 and few essential tables from the results are attached
below along with analysis.
Descriptive Statistics
Dependent Variable: time
taskemotion reward Mean Std. Deviation N
pleasant none 13.00 2.708 10
sweets 12.40 2.221 10
money 12.40 1.897 10
Total 12.60 2.238 30
unpleasant none 16.90 2.514 10
sweets 15.80 1.549 10
money 12.90 1.792 10
Total 15.20 2.578 30
Total none 14.95 3.236 20
sweets 14.10 2.553 20
money 12.65 1.814 20
Total 13.90 2.729 60
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Above descriptive statistics table and plot graph are observed and helped in summarizing
that mean time taken by pleasant emotion participants is lower from the mean time taken by
unpleasant emotion participants emphasizing that when participants were told that they are under
observation to complete a math test and not a fun exercise, they took higher time. Also, the
overall time taken by participants participated for reward was much higher than the participants
participated for no or small reward.
Tests of Between-Subjects Effects
Dependent Variable: time
Source
Type III Sum of
Squares df Mean Square F Sig.
Corrected Model 189.200a 5 37.840 8.167 .000
Intercept 11592.600 1 11592.600 2502.000 .000
taskemotion 101.400 1 101.400 21.885 .000
reward 54.100 2 27.050 5.838 .005
taskemotion * reward 33.700 2 16.850 3.637 .033
Error 250.200 54 4.633
Total 12032.000 60
Corrected Total 439.400 59
a. R Squared = .431 (Adjusted R Squared = .378)
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The above table is used to determine that whether there is an interaction between two
independent variables of the study or not. The row of task emotion * reward will analyze
whether interaction between these two variables is statistically significant or not. As the
significance or p value of this interaction is .033 which is lower than .05, the interaction between
these two variables is significant.
Multiple Comparisons
Dependent Variable: time
Tukey HSD
(I) reward (J) reward
Mean Difference
(I-J) Std. Error Sig.
95% Confidence Interval
Lower Bound Upper Bound
None sweets .85 .681 .430 -.79 2.49
money 2.30* .681 .004 .66 3.94
sweets none -.85 .681 .430 -2.49 .79
money 1.45 .681 .093 -.19 3.09
money none -2.30* .681 .004 -3.94 -.66
sweets -1.45 .681 .093 -3.09 .19
Based on observed means.
The error term is Mean Square(Error) = 4.633.
*. The mean difference is significant at the .05 level.
The above table is the multiple comparison table based on the post hoc test of Tukey. The above
table shows the interactions between all the variables and their values. Since, the significance
level values are less than 0.5, it can be said that the time taken for completion of the task is
different for each category of reward; concluding reward has a significant impact on
procrastination.
Recommendation
In a scenario, where it has been ascertained that the school children who do a lots of number
puzzles are more inclined to secure higher scores in GCSE math examinations and a school math
teacher wants to incorporate these puzzles into her lessons, there are few recommendations for
the math school teacher which should be considered by her to ensure effective results of the
students:
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