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then given treatment (X) and at the end of learning given posttest / final test (O2). The

shape of the pretest-posttest one-group design can be seen in the following table 3.1.

Table 3.1 One Group Pre-Test and Post-Test Research Design

Pre-test Treatment (Treatment) Post-Test

O1 X O2

Description:

O1 = Initial test of learner knowledge

X = Learning using study-based flipbook type e-modules

stunting cases
O2 = Final test of learner knowledge

3.5 Data Collection Instruments and Techniques
3.5.1 Data Collection Instruments

Instrumen used for data collection in this study:

1. Validation sheet

2. Observation sheet (observation sheet of learning implementation and
observation sheet of student activity)

3. Test sheet to measure learners' mastery of concepts

3.5.2 Data Collection Techniques

1. Validity
a) Validation Sheet

E-module validation consists of content validation and construct validation. The

e-module equivalidate assessment is used to determine the feasibility and suitability

of the contents in the e-module to be developed before being used to retrieve the