Example of Simple Random Sampling: Pollster

Representative Sample

Why is simple random sampling often difficult or impossible to achieve in psychological research?

A psychology researcher wants to study stress levels among all undergraduate students at a large university. She posts a survey link on the university's social media page and collects responses from the first 200 students who volunteer to participate. This procedure qualifies as simple random sampling because any student at the university could have seen the post and chosen to respond.

A researcher wants to select a group of 50 participants from a university directory of 1,000 students using simple random sampling. Arrange the steps of this procedure in the correct chronological order.

To implement a sampling method where every member of a target group has an equal selection chance, a researcher must manage several distinct components. Match each component to the analytical role it plays in ensuring the method is executed correctly.

In simple random sampling, every individual member of the target population has an equal chance of being selected for the study.

A researcher defines their target population as 'all working parents in a city.' If the researcher only selects participants from a list provided by one specific daycare center, which aspect of simple random sampling is being violated?

When critiquing the methodology of a study claiming to use simple random sampling for 'all adults with depression in North America,' a researcher would conclude the claim is likely invalid. This judgment is based on the fact that without a complete sampling frame, it is impossible to ensure that every individual in that population has a(n) _____ chance of being selected.

A psychology instructor wants to demonstrate how sampling feasibility changes depending on how populations are defined and accessed. Match each research scenario or component to the corresponding practical characteristic of simple random sampling.

When analyzing the limitations of psychological research designs, a methodologist points out that simple random sampling is rarely achieved. This is because, unlike political polling where databases of registered voters are available, psychological populations are rarely defined _____ enough to give everyone an equal chance of selection.

A research team is evaluating a proposed study to determine if it successfully implements simple random sampling. Order the steps they should take to establish and evaluate the sampling process, starting from population definition to final evaluation.

What is the defining characteristic of a simple random sample?

To achieve a true simple random sample of all college students in the United States, a researcher would need access to a complete and accurate list of every currently enrolled college student in the country.

A cognitive psychologist wants to draw a simple random sample of 100 registered voters in a small town to study their decision-making processes. Arrange the steps she must take to properly execute this sampling method.

A clinical psychologist wants to study the burnout rates of all registered nurses in Texas. She obtains a complete, official list of active nursing licenses from the state medical board and uses a random number generator to select 200 names from that list to receive her assessment. Analyze this study design and match each component to the correct methodological concept.

A research team submits a manuscript claiming they used simple random sampling to study the mental health of 'all currently enrolled university students in Canada.' To achieve this, they acquired complete student rosters from three of the largest universities in the country and used a computer algorithm to randomly select 1,000 students from those lists. As a peer reviewer, how should you evaluate their methodological claim?

To ensure a representative sample, a researcher might use ____ random sampling, which is a method where every single member of the target population has an equal chance of being selected.

Which statement best describes the primary practical limitation of using simple random sampling in psychological research?

A clinical psychologist wants to study the prevalence of sleep disorders among patients at a specific psychiatric clinic. She obtains the clinic's complete database of active patients, assigns each patient a unique ID, and uses a random number generator to select 100 patients to contact. This procedure is a successful application of simple random sampling.

A developmental psychologist is investigating the early play behaviors of 'all neurodivergent toddlers in North America.' To recruit her sample, she acquires the complete mailing list of a massive, multinational autism advocacy organization and uses a computer algorithm to randomly select 300 families to participate. When analyzing the structural components of this study's design, why does this approach fail to achieve simple random sampling?

As a peer reviewer, evaluate the methodological claims of the following studies. Match each proposed study design to the correct evaluation of whether it successfully achieved simple random sampling.