Psychology Research Methods Quiz

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Questions and Answers

What is the main focus of Dr Rox's mock study?

The main focus is on the effect of caffeine on reaction times.

What is the significance of using randomised control trials in psychological research?

Randomised control trials help minimize bias and establish causal relationships between variables.

What are the differences between one-tailed and two-tailed hypotheses?

One-tailed hypotheses predict the direction of the relationship, while two-tailed hypotheses do not specify a direction.

Why is it important to avoid using the term 'prove' in psychological research?

<p>Because psychological claims cannot be proven definitively, only supported by evidence or findings.</p>
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What is temporal validity in the context of psychological studies?

<p>Temporal validity refers to the extent to which research findings can be generalized across time periods.</p>
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How can using a postal questionnaire benefit psychological research?

<p>It allows researchers to collect data from a larger, geographically dispersed sample efficiently.</p>
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What role do psychometric tests play in psychology?

<p>Psychometric tests assess psychological traits, abilities, and processes quantitatively.</p>
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What is the purpose of writing null hypotheses in research?

<p>The null hypothesis serves as a statement that there is no effect or relationship between the studied variables.</p>
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What is an independent measures design?

<p>An independent measures design involves using different participants for each condition of the experiment.</p>
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What are demand characteristics in an experiment?

<p>Demand characteristics refer to cues that may inform participants about the purpose of the study, potentially influencing their behavior.</p>
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How does random allocation benefit an experimental design?

<p>Random allocation helps ensure that participants are evenly distributed across groups, minimizing the impact of participant variables.</p>
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What is the role of the control group in an experiment?

<p>The control group serves as a baseline for comparison with the experimental group, providing insights into the effects of the independent variable.</p>
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What is a potential problem of using an independent measures design?

<p>A problem is that individual differences among participants can affect the results, potentially leading to reduced validity.</p>
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How could Dr. Rox have improved her independent measures experiment?

<p>Dr. Rox could have improved her experiment by using matched pairs to minimize individual differences between participants.</p>
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What are order effects, and how can they be minimized in an experiment?

<p>Order effects refer to the influence that the sequence of conditions has on participants' performance, which can be minimized through counterbalancing.</p>
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In the doodling study by Andrade, what was the main variable manipulated?

<p>The main variable was whether participants were allowed to doodle or not during a memory task.</p>
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Why is it important for Dr. Rox to control variables like temperature in her study?

<p>Controlling variables like temperature ensures that any changes in reaction times can be confidently attributed to the independent variable, caffeine.</p>
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What does the term 'ecological validity' refer to in the context of laboratory experiments?

<p>Ecological validity refers to how well the findings of a study can be generalized to real-world settings.</p>
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How can high levels of control in a laboratory experiment benefit researchers?

<p>High levels of control allow researchers to isolate and manipulate independent variables, thus enhancing the reliability of causal inferences.</p>
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What might be a potential weakness of Dr. Rox's laboratory experiment?

<p>A potential weakness could be low ecological validity, as the laboratory setting may not mimic real-life scenarios that affect reaction times.</p>
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What is a significant challenge associated with field experiments?

<p>Field experiments are difficult to replicate due to the limited ability to standardise the procedure.</p>
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In the context of the study, what could affect reaction time apart from caffeine, according to the content?

<p>Factors like temperature, noise levels, and possible distractions could affect reaction times aside from the caffeine intake.</p>
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Why is ethical consent a problem in field experiments?

<p>Participants often do not know they are part of the research, preventing informed consent and the right to withdraw.</p>
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Why should researchers ensure participants have a consistent environment during an experiment?

<p>A consistent environment prevents external factors from influencing the results, leading to more valid conclusions.</p>
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What is one reason why deception might be used in psychological research?

<p>Deception might be used if the research aims cannot be met without it and if participants are unlikely to feel discomfort.</p>
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How does Dr. Rox's study design help infer cause and effect?

<p>By isolating the independent variable (caffeine) and controlling other variables, researchers can confidently attribute changes in reaction time to caffeine.</p>
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What is the primary advantage of using control groups in experiments?

<p>Control groups provide a baseline for comparison to validate that the experimental results are due to the independent variable's manipulation.</p>
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What aspect of Pozzulo et al.'s experiment illustrates a limitation in laboratory research?

<p>Participants had to identify characters from videos, which may not reflect realistic identification scenarios, highlighting low ecological validity.</p>
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In Dr Rox's study, what role does the water group play?

<p>The water group serves as the reaction speed baseline for comparison with the coffee group.</p>
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How might the results of a field experiment affect participants' perceptions of psychologists?

<p>If participants are deceived and learn about it later, they may develop doubts about psychologists in the future.</p>
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Can you suggest an alternative control group for Dr Rox's coffee study?

<p>An alternative control group could be a group that gets no beverage at all.</p>
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What was the focus of the Bandura et al. study?

<p>The study investigated whether children would imitate aggressive behaviour observed in adults.</p>
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What is a randomised control trial (RCT) and why is it considered the 'gold standard'?

<p>An RCT is a type of experiment where participants are randomly assigned to either an experimental group or a control group, increasing the validity of the results.</p>
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Describe the purpose of a control group in an RCT.

<p>The control group in an RCT serves to compare outcomes by receiving no treatment or a placebo, helping to isolate the effects of the experimental treatment.</p>
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What is a placebo, and how does it relate to the placebo effect in RCTs?

<p>A placebo is a treatment with no active ingredients that mimics the real treatment, and the placebo effect occurs when participants experience improvements due to their expectations rather than the treatment itself.</p>
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Explain what is meant by a 'single-blind design' in the context of RCTs.

<p>A single-blind design means that participants are unaware of whether they are receiving the actual treatment or a placebo, preventing their knowledge from affecting their behavior.</p>
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How do researchers calculate changes in symptoms before and after treatment in an RCT?

<p>Researchers measure symptoms in both the experimental and control groups before and after treatment and compare the changes to assess the treatment's efficacy.</p>
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Why is it significant for participants to be unaware of whether they received the drug or the placebo?

<p>It is significant because this lack of knowledge helps prevent bias in their responses and ensures that the results reflect the true effects of the treatment.</p>
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What role does expectancy play in the effectiveness of treatments in RCTs?

<p>Expectancy can lead to improvements in symptoms if participants believe they are receiving an effective treatment, which can confound the results of an RCT.</p>
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In the study mentioned by Perry et al., what were participants unaware of, and why was this important?

<p>Participants were unaware of whether they had received oxytocin or a saline solution, which was important to avoid bias in their behavior during the experiments.</p>
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What is the significance of double-blind randomised controlled trials (RCTs) in research?

<p>Double-blind RCTs ensure that neither the researchers nor the participants know which group they are in, enhancing the validity of the findings.</p>
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Why is valid, informed consent a concern in double-blind RCTs?

<p>Valid, informed consent is a concern because participants do not know whether they are receiving a placebo or genuine treatment.</p>
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What potential issue arises from treatment allocation in RCTs?

<p>Participants assigned to the control group may not have access to treatments that could significantly improve their quality of life.</p>
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What is a wait-list control group in the context of RCTs?

<p>A wait-list control group is a control group that receives treatment after the study has ended, rather than during it.</p>
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How do double-blind RCTs support inter-rater reliability?

<p>In double-blind RCTs, all participants receive the same treatment from experimenters, allowing for consistent assessments.</p>
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What ethical arguments support conducting double-blind RCTs despite the lack of informed consent?

<p>The benefits of the research findings are argued to outweigh the costs of not obtaining fully informed consent.</p>
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What role does participant consent play in double-blind RCTs, especially regarding the possibility of receiving a placebo?

<p>Participants consent to the possibility of receiving a placebo, which is essential for the integrity of the study.</p>
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In Dr. Rox's study, what was the control group's alternative to caffeine?

<p>The control group drank a cup of water instead of caffeine.</p>
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Flashcards

Randomised Control Trial (RCT)

A type of research study that uses random assignment to groups and compares the effects of an intervention or treatment.

Postal Questionnaire

A research method where data is collected from participants using mailed questionnaires.

Rating Scale: Forced/Fixed Choice

A type of questionnaire where participants must choose from a predetermined set of options, often on rating scales.

Psychometric Tests

Tests designed to measure psychological constructs, such as intelligence, personality, or aptitude.

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Null Hypothesis

A statement about the expected outcome of a study, assuming that the independent variable has no effect on the dependent variable.

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Alternative Directional (One-Tailed) Hypothesis

A hypothesis that predicts a specific direction of effect between the independent and dependent variables.

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Non-Directional (Two-Tailed) Hypothesis

A hypothesis that predicts that there is a relationship between the independent and dependent variables, but does not specify the direction of the effect.

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Temporal Validity

The extent to which a study can be generalized to other situations, times, and populations.

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Field Experiment

A type of experiment conducted in a real-world setting, often with participants who are unaware they are being studied.

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Lack of Informed Consent

An ethical concern in field experiments where participants may not know they are being studied and cannot provide informed consent.

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Replicability

The ability to duplicate the findings of an experiment under the same conditions, ensuring reliability and validity.

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Control Group

A group in an experiment that doesn't receive the treatment or manipulation being studied. It provides a baseline for comparison.

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Independent Variable

A variable that the researcher changes or manipulates to see its effect on the dependent variable.

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Dependent Variable

A variable that is measured to see if it is affected by the independent variable.

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Comparisons Between Groups

A strength of experiments where comparisons between groups allow researchers to determine if the independent variable truly caused changes in the dependent variable.

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Control Variables

A technique used in experiments to ensure that any observed differences in the dependent variable are due to the independent variable and not other factors.

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Independent Measures Design

A research design where participants are randomly assigned to different groups, each representing a different level of the independent variable.

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Experimental Group

The group in an experiment that receives the treatment or manipulation of the independent variable.

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Random Allocation

The process of randomly assigning participants to different groups in an experiment to ensure equal distribution of individual differences.

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Participant Variables

Characteristics or traits of participants that could influence the results of an experiment.

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Demand Characteristics

Factors that could influence the results of an experiment because participants know they are being observed.

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Ecological validity

The extent to which the results of a study can be applied to real-life situations.

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Randomized controlled trial (RCT)

A type of research study where participants are randomly assigned to groups, and the effects of different treatments (or the lack of treatment) are compared.

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Internal Validity

The ability of a research study to accurately measure what it is intended to measure.

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External Validity

The ability of a study to have the same effects even if the study is repeated using a different population, time, and place.

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Extraneous Variables

Factors that can influence the outcome of an experiment but are not the independent variable. Researchers aim to control these.

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Laboratory experiment

A type of experiment conducted in a controlled laboratory setting, where many variables can be carefully manipulated.

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Placebo

Used in RCTs to ensure participants don't know if they are receiving the real treatment or a fake one, helping to isolate the effect of the treatment itself.

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Single-Blind Design

Describes a study where participants are unaware of whether they're receiving the actual treatment or a placebo.

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Placebo Effect

The positive effects experienced by participants simply due to their belief that they are receiving a beneficial treatment.

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Expectancy Effects

Improving symptoms due to the belief in a treatment, regardless of whether it has any actual medicinal properties.

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Random Assignment

A technique used in RCTs to minimize bias by ensuring that participants are randomly assigned to either the experimental or control group.

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Double-blind RCT

A research method where neither the participants nor the researchers know who is in which group (treatment or control). This ensures that the researchers' expectations don't influence the results.

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Control Group in RCTs

A group in an experiment that doesn't receive the treatment being studied. They act as a baseline for comparison.

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Wait-list control group

In an RCT, the control group may not receive the treatment until the end of the study. This helps ensure the effectiveness of the treatment, but can also lead to delayed benefits for participants.

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Informed Consent in RCTs

In an RCT, ethical concerns arise because participants may not know they're receiving a placebo. This means they may not be giving fully informed consent.

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Random Allocation in RCTs

Participants are randomly assigned to different groups in an RCT to ensure that any differences between groups are due to the treatment and not to other factors.

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Strengths of RCTs

RCTs are a powerful research method for studying cause and effect because they control for extraneous variables and allow researchers to draw strong conclusions about the effectiveness of interventions.

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Ethical concerns of RCTs

RCTs can delay access to treatment for participants in the control group, which could be harmful to their well-being, especially if the condition is serious.

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Replication in RCTs

Since participants are randomly assigned to groups, they are all treated the same way by the experimenters, ensuring that the results are reliable and can be replicated.

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Study Notes

Research Methodology

  • Research methods are crucial components of the science of psychology.
  • Key methods include experiments (laboratory and field), self-reports (questionnaires and interviews), observations, correlations and longitudinal studies.
  • Each method comes with its own strengths and weaknesses relating to validity, reliability and generalisability.

Methodological Concepts

  • Aims: Clearly defined statements of the research's purpose and intended outcomes.
  • Hypotheses: Testable predictions about the relationship between variables (directional or non-directional).
  • Variables: Factors that are measured or manipulated (independent/dependent/co-variables).
  • Operational definitions: Precise definitions of variables specifying how they will be measured.

Sampling of Participants

  • Population: The entire group of individuals that a researcher is interested in studying.
  • Sample: A subset of the population selected for the research.
  • Sampling techniques: Methods for selecting participants from a population (e.g., random, opportunity, volunteer).
  • Generalizability: The extent to which findings can be applied to the wider population.
  • Representativeness: How well the sample reflects the characteristics of the population.

Ethical Considerations

  • Valid consent: Participants must be aware of the study's nature and give their agreement to participate.
  • Confidentiality: Protecting participant privacy; data must not be identifiable.
  • Debriefing: Providing participants with information about the study's aims and results after its completion, addressing any concerns.
  • Right to withdraw: Participants should be free to leave the study at any time without penalty.
  • Minimising harm: Protecting participants from physical and/or psychological harm throughout the research process.
  • Use of Deception: Deception in research should be justified and followed by informed debriefing to mitigate potential harm.

Data Analysis

  • Quantitative data: Numerical data, easily analyzed statistically.
  • Qualitative data: Non-numerical data, requiring interpretation for analysis.
  • Descriptive statistics: Summarize the data (e.g., mean, median, mode, standard deviation, range).
  • Inferential statistics: Assess whether the findings of a study are statistically significant, showing whether the results are likely due to chance or a real effect.

Validity and Reliability

  • Validity: The extent to which a study measures what it intends to measure and its findings can be generalised.
  • Reliability: Consistency of a study's results; if the study is replicated, similar results can be expected.
    • Test-retest reliability: Consistency of results when repeated over time.
    • Inter-rater reliability: Agreement among different observers/raters in their assessment.

Thinking Fast & Slow

  • System 1 thinking: Fast, automatic, intuitive.
  • System 2 thinking: Slow, conscious, rational.

Choice Heuristics

  • Availability heuristic: Decisions based on how quickly examples come to mind.
  • Representativeness heuristic: Judging things based on how well they fit a prototype or category.
  • Recognition heuristic: Choosing the more familiar option when faced with unfamiliar choices.
  • Take-the-best heuristic: Selecting the best-known characteristic that differs between choices.
  • Anchoring heuristic: Initial information influences subsequent judgments.

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