Science Shorts: Hypothesis Testing—It’s Okay to Be Wrong
Tue, Dec 05, 2017 10:15 PM
Hypothesis Testing
This is an article about hypothesis testing. Many students may seek affirmation from others to ensure their hypothesis. The author wants to tell students it is OK to have mistaken. Do not be embarrassed by being wrong.
The article takes an example of Priestley, a famous chemist. He had wrong in his prediction of the survival condition green plant in a sealed jar with burning candle. Fortunately, it facilitated the important discoveries of oxygen and photosynthesis. “The accuracy of the hypothesis has no impact on what can be learned from the investigation. It’s the outcome that matters, not the predicted outcome” (Davis & Coskie, 2009).
The authors record a testing hypothesis about “Do beans need light to grow” for grade 5-6. Firstly, students need to learn how to write a hypothesis. They can write a brief paragraph or even a sentence about their prediction in their science textbooks. Make sure to include a reason. During the three weeks, students should water the plants, make drawings, and collect data. After that, students need to harvest the plants and measure the aboveground mass using a digital scale. Then, constructing a simple bar graph to analyze data. Teachers will encourage students to see if the result is similar to their hypothesis and write a conclusion statement using the supported or unsupported language. As an extension, the teacher can ask students to think about other factors which can affect the growth of beans. They can also formulate a new hypothesis about other questions, such as “Where does the nutrition come from”.
Obviously, making hypothesis is difficult for low grades students. Therefore, they can choose to write a simple prediction and share their ideas. However, data collection should include side-by-side drawing and measurements.