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The authors of the paper "Fudging the Numbers: Distributing Chocolate Influences Student Evaluations of an Undergraduate Course" (Teaching in Psychology [2007]: \(245-247\) ) carried out a study to see if events unrelated to an undergraduate course could affect student evaluations. Students enrolled in statistics courses taught by the same instructor participated in the study. All students attended the same lectures and one of six discussion sections that met once a week. At the end of the course, the researchers chose three of the discussion sections to be the "chocolate group." Students in these three sections were offered chocolate prior to having them fill out course evaluations. Students in the other three sections were not offered chocolate. The researchers concluded that "Overall, students offered chocolate gave more positive evaluations than students not offered chocolate." Indicate whether the study is an observational study or an experiment. Give a brief explanation for your choice.

Step by step solution

01

Understand the scenario

Read and understand the scenario. In this case, the scenario details a study where students who are given chocolate before filling out course evaluations give more positive reviews. It's important to note here that the researchers controlled the process by deliberately choosing when, and to whom, the chocolates were given.

02

Identify key elements of the study

Does the study observe and measure variables of interest without influencing it? Or does it deliberately impose a treatment to measure the responses? In here, aside from observing and measuring the students' evaluations, the researchers also influenced it by giving chocolates to selected students. The researchers then measured the responses (evaluations).

03

Label the study

Based on the pieces of evidence, the study influences the responses of the interaction (in this case, course evaluations) by using a treatment (offering chocolates). Thus, this study is not merely observing the variables of interest (students' course evaluations) without influencing it, meaning it can't be categorized as an observational study. Instead, the study is actively manipulating a variable (offering chocolate) and observing the effect on another variable. Therefore, it is best classified as an experiment

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Observational Study vs Experiment

Understanding the differences between an observational study and an experiment is crucial in educational research methods. In an observational study, researchers collect data by observing subjects in their natural environment without any intervention. This method is often used to identify patterns and relationships.

On the other hand, an experiment involves the intentional manipulation of variables to observe the effects of this change. Experiments are characterized by the use of a control group and an experimental group, where the latter receives a specific treatment or intervention.

Let's contextualize this with the given educational research scenario where some students received chocolate before evaluations, whereas others did not. This intentional manipulation of the conditions—a treatment of 'chocolate'—transforms the study into an experiment. This approach allows researchers to assess cause-and-effect relationships, in this case, whether receiving chocolate impacts students' evaluations of a course.

Influencing Factors in Evaluations

In the realm of educational assessments, several factors can influence the outcomes of evaluations that need to be considered. Factors such as the environment, timing, and personal biases can skew results and lead to less reliable data.

For instance, environmental factors, like classroom comfort or even the offer of chocolate, could introduce extraneous variables—details not controlled for which might affect the outcome. Timing can also play a role; the mood of students near finals might be different from that at the start of a semester. Personal biases of students, such as their predispositions towards the subject or instructor, can all impact their evaluations. It's essential to identify and mitigate these factors to improve the validity and reliability of assessments in educational research.

Experimental Design in Education

Optimal experimental design within education is vital for generating trustworthy and actionable insights. A well-designed experiment includes clear identification of independent and dependent variables, a control group, random assignment, and procedures to control for confounding variables.

When dealing with educational research, like evaluating teaching methods or curricular interventions, the design must consider the unique educational setting and constraints. The conditions of the experiment should closely resemble authentic teaching and learning situations to enhance the external validity of the study.

Moreover, ensuring ethical standards and safeguarding student well-being are paramount. In our chocolate example, the simplicity of offering chocolate versus not can serve as an accessible model for more complex educational interventions. Carefully designed experiments in education can significantly contribute to our understanding of learning processes and effective teaching practices.