Computation

Computation Definition in Psychology

Calculating computation is often used to analyse data derived from research. Computations allow researchers to organise better and describe their data.

Computation Calculation Methods: Significant Figures

When collecting data, researchers occasionally make rough estimations on data to get an understanding and to identify expected results.

Suppose a researcher found that 53,286 participants had responded to their questionnaire and 366 participants did not complete the questionnaire. The researcher would round the figures up and down, to 50,000 participants minus 400 participants. So, the researchers would assume that roughly 49,600 questionnaires would be later analysed (50,000 - 400 = 49,600).

Computation Calculation Methods: Recognise and Use Expressions in Decimal and Standard Form

In research, there are specific standards concerning data presentation. For example, reported data should always be rounded to two decimal places.

In research, the figures can occasionally be too small or too large. These are typically difficult to report. Researchers often express these figures in standard form when this is an issue. Let's take a look at how you can convert a number into its standard form.

We multiple it negatively to move it back into the decimal place. If the number was 13,800, we would write it as 1.38 x ${10}^4$.

Computation Calculation Examples

Let's examine how ratios, percentages and fractions are calculated and used in research!

Computation Formula: Ratios

Ratios are a form of computation used to compare the amounts of two things, similar to fractions are commonly reported in their simplest form.

A researcher may want to compare how many females to males participated in their study. An easy way to illustrate these two groups' differences is by writing the data in ratio form.

In the study, 18 females and 36 males took part. The ratio of females to males would be written as 18: 36. The smallest number that these can be divided into is 3. So, this would be written as 6: 12. This can be further divided into 2: 4 and finally 1: 2, which is the ratio in its simplest form.

Computation Formula: Percentages

Percentages are often used to show the frequency of variables. A percentage is the proportion of something in comparison to a whole. For example, if 15% of readers already know the definition of percentages, we can infer that 85% of readers do not know what it is.

If we add 15 and 85 together, it equals 100. When totalled, Percentages should equal 100; hence the cent in percentages.

Let's look at the example frequency table below and calculate the percentage for each variable, for 80 colour choices.

We first need to find the total frequency (80) to calculate the percentage. Then we can calculate percentages by calculating: frequency / total frequency x 100.

Computation Formula: Fractions

Fractions are used to illustrate parts of a whole. After looking at this example, you will understand the meaning of fractions.

Lucy just ordered pizza; she ordered enough for her dinner and breakfast the next day. There were eight slices total, but she ate five for her dinner. Therefore, she ate five parts of the whole (eight) pizza. As a fraction, this would be written as $\frac{5}{8}$.

Researchers can sometimes use fractions to make estimations. From the amount of pizza that Lucy ate, we can estimate that she ate just over half of the pizza and had less than half left for her breakfast in the morning.

Now that we have understood the concept of fractions let's look at how we can convert a fraction into decimal form. Although this may sound complicated, you simply divide the part by the number representing the whole.

Using the example of Lucy described above, you need to divide 5 by 8. The answer is 0.625.

Computational Arithmetic Operations: Arithmetic Means

The above forms of computations are used to identify proportions within data, e.g. of variables, but some types of computations such as the mean can be used to describe data. The mean is used to measure the average of data. The mean can be found by totalling the numbers in the dataset and dividing it by the number of digits.