The conditions or characteristics that appear, disappear or change in the___________ variable as the experimenter introduces, removes or changes_______ variable.
Understanding Experimental Variables
In scientific research, experiments are designed to explore relationships between different factors, often to understand cause and effect. To achieve this, researchers distinguish between different types of variables. These variables are key to designing a controlled study.
Independent Variable Role
The independent variable is the factor that the experimenter manipulates or changes intentionally. It's considered the 'cause' in a cause-and-effect scenario. By altering the independent variable, the researcher aims to observe any resulting changes.
Dependent Variable Role
The dependent variable is what the experimenter measures or observes. It is expected to change in response to the manipulation of the independent variable. This variable represents the 'effect' and its value is hypothesized to depend on the state of the independent variable.
Connecting Variables in Experiments
The question describes a scenario where certain characteristics change based on an experimenter's actions. Let's break down the sentence: "The conditions or characteristics that appear, disappear or change in the___________ variable as the experimenter introduces, removes or changes_______ variable."
- The phrase "appear, disappear or change" refers to the outcome or the measured response, which is characteristic of the dependent variable.
- The phrase "experimenter introduces, removes or changes" directly points to the factor being manipulated, which is the independent variable.
Therefore, the dependent variable is observed to change when the independent variable is altered.
| Variable Type | Experimenter's Action | Observed Outcome |
|---|---|---|
| Independent Variable | Manipulated / Changed | N/A (It's the input) |
| Dependent Variable | Measured / Observed | Changes / Appears / Disappears (as a result of IV changes) |
Variable Identification in the Question
Based on the definitions and the structure of the question, the first blank should be filled with 'dependent' and the second blank with 'independent'. This aligns with the principle that changes in the independent variable lead to observable changes in the dependent variable.
The completed sentence is: "The conditions or characteristics that appear, disappear or change in the dependent variable as the experimenter introduces, removes or changes independent variable."
Important Questions from Variables
Identify the dependent variable in the following study. "Effect of computer Assisted Instruction on the learning of Tamil Grammar of IX standard students of Tamilnadu".
In a research problem 'studying the effect of Teaching Methods on the Scholastic Achievement of boys and girls in terms of their socio-economic background'. Which can be designated as independent variable?
A university teacher plans to study the effect of level of aspiration of students in terms of their socio-economic background on their scholastic performance at the term end evaluation conducted by an external testing agency. What is the dependent variable in this study?
With what name an attribute like height, weight or happiness that is measurable and that is assigned with changing values be called?
A variable that is manipulated is known as:
