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Chapter 1: Problem 9

New Teaching Methods An educational researcher wants to evaluate the effectiveness of a new method for teaching reading to deaf students. Achievement at the end of a period of teaching is measured by a student's score on a reading test. a. What is the variable to be measured? What type of variable is it? b. What is the experimental unit? c. Identify the population of interest to the experimenter.

Short Answer

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What type of variable is it? The variable to be measured in this study is the student's score on a reading test, which indicates their achievement after the period of teaching. This variable is a quantitative variable, as it represents a numerical value that can be measured and compared for each student. b) What is the experimental unit? The experimental unit in this study is a deaf student who is participating in the new method for teaching reading. Each of these students will receive the intervention (the new teaching method) and their test scores will be measured to evaluate the effectiveness of the method. c) Identify the population of interest to the experimenter. The population of interest to the experimenter is the group of all deaf students who could potentially benefit from the new teaching method. This could include deaf students from various socio-economic backgrounds, age groups, and learning needs. The study aims to determine if the new method is effective in general for this entire population.

Step by step solution

01

a) What is the variable to be measured? What type of variable is it?

The variable to be measured in this study is the student's score on a reading test, which indicates their achievement after the period of teaching. This variable is a quantitative variable, as it represents a numerical value that can be measured and compared for each student.
02

b) What is the experimental unit?

The experimental unit in this study is a deaf student who is participating in the new method for teaching reading. Each of these students will receive the intervention (the new teaching method) and their test scores will be measured to evaluate the effectiveness of the method.
03

c) Identify the population of interest to the experimenter.

The population of interest to the experimenter is the group of all deaf students who could potentially benefit from the new teaching method. This could include deaf students from various socio-economic backgrounds, age groups, and learning needs. The study aims to determine if the new method is effective in general for this entire population.

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Key Concepts

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

Variable Measurement
In the realm of educational research, identifying the correct variable measurement is critical to assess the effectiveness of teaching methods accurately. Here, the research focuses on measuring the 'student's score on a reading test.' This variable quantifies the achievement level of each student after being taught using the new method. The score is a **quantitative variable** because it represents numerical data that can be evaluated and compared from student to student.

Quantitative variables are crucial in research as they allow for a clear and objective measurement of outcomes, making it easier to analyze results statistically. In this case, by recording and analyzing these test scores, researchers can make informed conclusions about the effectiveness of the new teaching method. For instance, average scores and their distributions can be compared before and after the intervention to check for significant improvements.
  • Quantitative Variable: Represents numerical data.
  • Objectivity: Allows for clear analysis and comparison.
  • Statistical Evaluation: Helps in drawing conclusive insights about the research findings.
Experimental Unit
An experimental unit in a study defines what or who is being studied. In this exercise regarding educational research methods, the **experimental unit** refers to individual deaf students who are participating in testing the new reading teaching method. Each student receives the instruction according to the new method, and their performance is individually assessed through the reading tests.

Understanding the experimental unit is vital because it dictates the level at which data is collected and analyzed. In educational settings, students often serve as experimental units, given they are the direct recipients of teaching interventions.
  • Represents a single item, subject, or entity in a study.
  • Integral for defining the scope and scale of data collection.
  • Influences how outcomes are individually measured and analyzed.
Population of Interest
The **population of interest** in a research study includes individuals who are the focus of the investigation and could benefit from the findings. For this educational research evaluating a new method for teaching reading to deaf students, the population of interest encompasses all deaf students who might foreseeably benefit from this approach. This includes those across various demographics, socioeconomic statuses, ages, and educational backgrounds.

By determining the correct population of interest, the researcher ensures that the conclusions drawn from the study are applicable to the intended group. This helps in optimizing the teaching method to suit the needs of a broader audience within the population. It also assists in generalizing the research findings, ensuring that the new method could effectively enhance reading skills among diverse groups of deaf students.
  • Encompasses the group that the study's findings apply to.
  • Ensures conclusions are relevant and useful to intended beneficiaries.
  • Aids in generalizing research results to a broader context.

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Most popular questions from this chapter

Discrete or Continuous? Identify each quantitative variable as discrete or continuous. a. Number of boating accidents along a 50 -mile stretch of the Colorado River b. Time required to complete a questionnaire c. Cost of a head of lettuce d. Number of brothers and sisters you have e. Yield in kilograms of wheat from a 1 -hectare plot in a wheat field

Continuous or Discrete, again Identify each variable as continuous or discrete: a. Number of people in line at a supermarket checkout counter b. Depth of a snowfall c. Length of time for a driver to respond when faced with an impending collision d. Number of aircraft arriving at the Atlanta airport in a given hour

Preschool The ages (in months) at which 50 children were first enrolled in a $$\begin{aligned}&\text { preschool are listed below. }\\\&\begin{array}{llllllllll}38 & 40 & 30 & 35 & 39 & 40 & 48 & 36 & 31 & 36 \\\47 & 35 & 34 & 43 &41 & 36 & 41 & 43 & 48 & 40 \\\32 & 34 & 41 & 30 & 46 & 35 & 40 & 30 & 46 & 37 \\\55 & 39 & 33 & 32 & 32 & 45 & 42 & 41 & 36 & 50 \\\42 & 50 &37 & 39 & 33 & 45 & 38 & 46 & 36 & 31\end{array}\end{aligned}$$ a. Construct a stem and leaf display for the data. b. Construct a relative frequency histogram for these data. Start the lower boundary of the first class at 30 and use a class width of 5 months. c. Compare the graphs in parts a and b. Are there any significant differences that would cause you to choose one as the better method for displaying the data? d. What proportion of the children were 35 months (2 years, 11 months) or older, but less than 45 months ( 3 years, 9 months) of age when first enrolled in preschool? e. If one child were selected at random from this group of children, what is the probability that the child was less than 50 months old ( 4 years, 2 months) when first enrolled in preschool?

Quantitative or Qualitative? Identify each variable as quantitative or qualitative: a. Ethnic origin of a candidate for public office b. Score \((0-100)\) on a placement examination c. Fast-food establishment preferred by a student (McDonald's, Burger King, or Carl's Jr.) d. Mercury concentration in a sample of tuna

Symmetric or Skewed? Do you expect the distributions of the following variables to be symmetric or skewed? Explain. a. Size in dollars of nonsecured loans b. Size in dollars of secured loans c. Price of an 8 -ounce can of peas d. Height in inches of freshman women at your university
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