Research MethodsLecture 1

What is Science & Defining Research Questions

Chapters 1 & 4

What is Psychology? Study of human behaviour.

Why are some people afraid to go on a bus?

What intervention(s) are effective in helping people overcome their fears about going on a bus?

What are the characteristics of a persuasive salesperson?

What work-related factors are associated with higher work-related absenteeism?

Scientific Research in Psychology

Helps us fill the gaps in our knowledge about human behaviour.

Scientific Method is Devoid Of: Personal beliefs Perceptions Biases Values Attitudes Emotions

Scientific Method – 5 StepsAsking the QuestionProblem Identification &Forming Hypothesis(es)

Experimental Design & Methods

CollectingRelevantInformation (data)

Testing theHypothesis -Data analysis

Interpretation &Communication

Asking the Question Problem identification or knowledge gap

Why are some people afraid to go on buses?

Identifying the important related concepts or factors Demographics Number of other passengers on the bus. Afraid in other public places Afraid in other transportation vehicles Other fears

Asking the Question Frame the question as a testable

hypothesis. Scientific hypothesis (expressed as the

expected or predicted relationships between variables).

“People who are afraid to travel on a bus are also afraid in other public places.”

Experimental Design & Methods

Takes considerable thought and research. Consider what needs to be controlled in

order to get an unbiased answer to the question.

Consider what variables will be manipulated (i.e., controlled by the experimenter).

Consider what variables will be measured as responses to the experimental variables.

Experimental Design & Methods

“People who are afraid to travel on a bus are also afraid in other public places.”

Consider what needs to be controlled in order to get an unbiased answer to the question. Travel on other vehicles in private. Being in a private place that is not a vehicle. Familiar but public place Unfamiliar but public place

Experimental Design & Methods

“People who are afraid to travel on a bus are also afraid in other public places.”

Consider what variables will be manipulated (i.e., controlled by the experimenter). Observe subjects in specific situations (e.g., on

bus in public, on bus in private, in car with other people in public, in car by self in public, in public walking, at home by self, at home with others).

Experimental Design & Methods

“People who are afraid to travel on a bus are also afraid in other public places.”

Consider what variables will be measured as responses to the experimental variables. Self-reported anxiety symptoms using a

validated scale. Physiological arousal (e.g., heart rate) Behaviour (e.g., avoidance, escape)

Experimental Design & Methods

“People who are afraid to travel on a bus are also afraid in other public places.”

Decide on which self-report measure of anxiety to employ.

Decide how to measure heart rate (apparatus and who to do the assessment).

Decide who your subjects will be. Decide how to select your subjects. Decide how many subjects to assess.

Collecting Relevant Information

“People who are afraid to travel on a bus are also afraid in other public places.”

Important to approach the experiment with an attitude of “testing” the hypothesis, not “proving” the hypothesis.

Pilot testing and refinement of methods. Implementing the methods.

Testing the Hypothesis and Data Analyses

“People who are afraid to travel on a bus are also afraid in other public places.”

Using appropriate statistical analyses techniques. How might we test this hypothesis with

the data we collected?

Interpretation & Communication of the Results

“People who are afraid to travel on a bus are also afraid in other public places.”

Provide an interpretation of the results. Consider problems in the design that might weaken

your confidence in the results. Consider how the results inform understanding about

the theory for this question (if there is a theory). Consider next steps in furthering knowledge about

this. Publish

Responsibility to inform others of your findings.

Characteristics of the Scientific Approach

Control – eliminating the influence of extraneous variables that could affect the observations (confounds).

Operational definition – defining the steps or operations used to measure the phenomenon (e.g., anxiety).

Replication – Reproducibility of the results.

Basic Assumptions Underlying Science

Determinism – belief that there are causes or determinants of behaviour.

Reality – belief that there is an underlying reality or truth in nature.

Rationality – events can be understood through the use of logical thinking.

Regularity – events in nature follow same laws.

Discoverability – it is possible to discover the uniformity or laws in nature.

Objectives of Science Description

Discover that the phenomenon exists Demonstrate that the phenomenon

exists Describe its elements

Objectives of Science Explanation

Why does the phenomenon exist What causes the phenomenon Causes are the antecedent conditions

that result in the occurrence or manifestation of the phenomenon.

Objectives of Science Prediction

Ability to anticipate the event. Knowing the antecedent to the

phenomenon allows one to predict the phenomenon.

Objectives of Science Control

You can manipulate the antecedent conditions and thus control the occurrence of the phenomenon.

Psychologist indirectly influence an organism’s behaviour through manipulating the antecedent events of that behaviour.

You can’t control the behaviour directly but you can usually exert some degree of control over the antecedent events that cause the behaviour.

Objectives of Science In science the term ‘control’ has three

meanings:1. Check or verification in terms of a

comparison (e.g., control group comparison).

2. Eliminating the influence of extraneous conditions that might cause the results of the experiment.

3. Being able to produce a change in a phenomenon by manipulating the antecedent events.

Scientific Theory Theory is the explanation for the

phenomenon. Theories not only describe why or

how the phenomenon occurred but also guides the way for further research.

Theories are often referred to as models for a specific phenomenon.

Transtheoretical Model(Prochaska & DiClemente, 1992)

Precontemplation

Preparation

Contemplation

Maintenance

Action

Relapse

RISK-ADAPTATION MODEL

optimism

pessimism

DispositionalTendencies High

Low

Modifiability

High

Low

Consequentiality

Risk-Adaptation Appraisal

Good

Poor

Attention

High

Low

Salience

Developing the Research Question

Idea

Research Question

Research Hypothesis

Literature Review

Research Design

Idea

Research Question

Research Hypothesis

Literature Review

Research Design

Model 1 Model 2

Where do the ideas come from? Everyday life Practical issues or needs Past research Theory

Sources of Research Questions Everyday life

What are the most effective ways to teach research methods?

What personal characteristics make a favorable impression in a job interview?

What other questions come to mind?

Sources of Research Questions Practical Issues

Why do some employees have very high absenteeism rates.

Why do more car accidents happen on specific stretches of the road?

Why are most heart attacks on a Monday morning?

Sources of Research Questions Past research

Knowledge develops in small steps. Rarely does one study answer all the questions to the research topic.

General Health Enhancement Smoking Cessation Program is Associated with Better Smoking Cessation Rates than a Targeted Cessation program

J. Irvine, P. Ritvo, A. Matthew, S. Hotz, C. Strickland, R.

Gilbert, F. Ashbury, L. Lockyer, & E. Wilson

York University & University of Toronto

Rationale Self-efficacy about smoking cessation

is associated with a greater likelihood of successfully quitting smoking.

We hypothesized that assisting smokers to build efficacy about health behaviour changes generally would help build their confidence about quitting smoking and thereby result in higher cessation rates than a program solely targeted to smoking cessation.

Smoking Cessation:Research Question

Does providing smokers with a program that assists them build confidence about health behaviour change generally, lead to higher smoking cessation rates than a program solely targeted to quitting smoking?

Smoking Cessation Study Design

R an d om ized C om p ara tive S tu d y

6 - M on thF o llow -u p

Targ e ted P rog ramN = 3 3 4

6 - M on thF o llow -u p

C on fid en ce-B u ild in g P rog ramN = 3 3 9

R an d om ized

6 7 3 S m okers

Smoking Cessation Programs

Intervention ElementsTargeted

Intervention Physician advice NRT Self-help guide Telephone

counseling

Confidence-Building Intervention

Physician advice NRT Self-help guide Telephone counseling Assessment &

additional health interventions tailored to individual preferences

Targeted Program Smoking cessation program based

on the transtheoretical model (TTM) developed by the Canadian Council on Smoking and Health (CCSH). Stage-based intervention guide NRT Physician advice Telephone counseling

Confidence-Building Intervention

CCSH – Stage-based intervention Confidence-building intervention

Raising self-confidence re: resisting smoking

Building realistic-optimistic expectancies Energy management Exercise Finding social support Stress management Controlling alcohol consumption Better sleep, rest, and relaxation

Self-reported 4-week Sustained Quit Rates at 6-Months Follow-up

0%

2%

4%

6%

8%

10%

12%

14%

16%

Not Smoking

ConfidenceTargeted

Intention-to-treat analysis with subjects lost to follow-up(n=158) classified as smokers: P < .05

Conclusions The addition of interventions

assisting subjects to build their confidence about making other health behaviour changes in addition to smoking cessation resulted in higher smoking cessation rates at 6-months follow-up.

Unanswered Questions What questions about smoking

cessation programming remain unanswered by this study?

What questions about smoking cessation programming are raised by this study?

Change in Confidence about Resisting Smoking

0

10

20

30

40

50

60

70

80

Confidence Building Targeted

BaselineFollow-up

Self-efficacy increased significantly in both groups (p< .0001).There were no treatment group differences.

Sources of Research Questions Theories

Summarize & integrate existing knowledge

Suggests new relationships between factors

Helps one make new predictions about a phenomenon based on the theory.

Defining the Research Question

Caveat – Not all ideas are subject to scientific enquire.

Research question must be capable of being confirmed or refuted.

The study must be feasible. Variables in the problem should

express a relationship: E.g., What relationship exists between

two or more variables?

Defining the Research Question - continued

Problem should be capable of being stated in a question form. Examples are: What is the effect of….? Under what conditions do….? Does the effect of….?

A research question defines the area of interest but is not a declarative statement like a hypothesis.

Formulating Hypotheses Stated in declarative form. Posits a relationship between

variables. Ideally reflects a theory or body of

literature. Is brief and to the point. Is testable.

Examples of Hypotheses

Research Idea

Question Hypothesis

Drug abuse and child abuse

Is drug abuse related to child abuse?

There is a positive relationship between drug abuse among adults and their physical and psychological abuse as children.

Examples of HypothesesResearch Idea

Question Hypothesis

Effects on your health of caring for a partner who is demented

Does caring for a partner who has a dementia affect the caregivers’ health?

There is a positive relationship between degree of caregiver burden and risk of dying prematurely.

Hypotheses Scientific hypothesis states the

‘predicted’ relationship amongst the variables.

Null hypothesis is a statement of no relationship amongst the variables.

Assignment Decide on a research idea. Write your research question. Perform a limited literature search

related to your question. Write a brief paragraph as foreground

justification for your research question. Based on the lit search, refine your

question.

Reading and Reviewing a Research Article

Overview Understanding the article

Developing ideas from the article.

Reading for Understanding Choosing an article Reading the abstract Reading the introduction Reading the method’s section Reading the result’s section Reading the discussion

Choosing an Article Selecting the right articles may be the most

important step. Approaches to finding an interesting article.

Track down study that you heard or read about. Look through contents of current journals

looking for articles with relevant titles. Search the literature using printed tools like

Psychological Abstracts or electronic indexes.

Reading the Abstract The abstract is a summary of the

article. If you don’t like the abstract of the

paper, consider finding another paper.

Abstract Author & title Publication information General statement of purpose of

study Methods (how it was carried out,

including measures) Main results Conclusion

Reading the Introduction May be difficult and time-consuming,

but it tells you what hypotheses they are testing and why. It sets the stage for the rest of the

article. Don’t leave the introduction without

knowing: What the hypothesis is Why they are testing the hypothesis

Reading the Methods Section Who the participants were

This is usually in the Participants subsection

What happened to the participants This is usually in the Procedures

subsection

Reading the Results Section Know what the scores (data) mean

Know whether the hypotheses were supported.

Reading the Discussion Summarizes the results relating to the

hypothesis Integrates/reconciles results with

introduction Discusses study’s limitations May suggest future research

Literature Search Decide on information sources

Journals, book, dissertation abstracts Decide which databases

PsychINFO, Index Medicus, review articles, other related articles, etc.

How far back to search? What terms to include in your

search?

Literature Search Thesaurus of Psychological Index

Terms American Psychological Association

publication of terms to use in doing a literature search on psychological topics.

Index Medicus Science Citation Index Expanded Social Science Citation Index Index of Scientific Reviews

Searching the Research Question

State your research topic as a single question.

Identify the separate concepts that make up the question.

Use the Psychological Thesaurus to find descriptors for the concepts or try your own descriptors.

Limit your literatures searches by language, year, etc.

Literature Searches In addition to electronic data bases,

you can get great leads on literature by consulting the reference list of related review articles or even primary sources of research studies.

Let me know… If there are any topics from today’s

lecture that need fuller explanations. Anything you particularly liked about

the lecture (today’s or others as we go along).

Anything you particularly disliked about the lecture (today’s or others as we go along).