Asch’s studies showed that conformity is shaped by features of the social situation. In particular, the size of the majority, whether the majority is unanimous, and how difficult the task is can all change how likely people are to agree.

Asch’s line judgment research

Asch investigated conformity using a simple line judgment task. Participants were shown one standard line and three comparison lines, then asked which comparison line matched the standard in length.

The correct answer was usually obvious.

In each group, the real participant was tested alongside confederates, who were people working for the researcher. On certain trials, the confederates all gave the same wrong answer before the real participant responded. This created pressure to agree with the majority even when the majority was clearly incorrect.

Before looking at the variables, it is useful to define the key behavior being measured.

In Asch’s original study, participants conformed on about one third of the critical trials. However, Asch also showed that conformity was not fixed. It changed when features of the situation were altered.

Group size

One important variable was group size, meaning the number of confederates forming the majority against the real participant.

Asch changed the number of confederates to see whether a larger majority would increase conformity. His findings showed a clear pattern:

• With one confederate, conformity was very low.

• With two confederates, conformity increased.

• With three confederates, conformity rose to about 32%.

• Adding more confederates beyond three made little difference.

This suggests that the pressure to conform increases as the majority becomes larger, but only up to a point. A majority of three appears to be enough to create strong pressure. After that, extra people do not add much more influence.

The effect of group size matters because it shows that conformity depends partly on how strong the majority appears. A single person can often be ignored, but a group of three seems much harder to resist. At the same time, Asch’s findings suggest that people do not simply conform more and more as numbers keep rising. Instead, the effect reaches a kind of ceiling.

Unanimity

Another major variable was unanimity, which refers to whether the majority is completely united in its view.

In Asch’s original procedure, the confederates were unanimous because they all gave the same wrong answer. Asch then introduced a dissenter to break this agreement.

The dissenter could behave in one of two ways:

• give the correct answer

• give a different wrong answer

Both types of dissent reduced conformity. When there was no longer a fully united majority, the real participant was much more likely to respond independently. Conformity dropped sharply, often to around 5.5% when one confederate gave the correct answer.

This is a very important finding because it shows that people are more willing to resist the majority when they are not the only one doing so. Even if the dissenter does not agree with the participant’s answer, simply breaking the group’s complete agreement makes resistance easier.

A unanimous majority seems powerful because it creates the impression that everyone else sees the situation in the same way. Once that unanimity is broken, the pressure weakens. The participant may feel less isolated and more confident in their own judgment.

Task difficulty

A third variable was task difficulty. Asch made the line judgment task harder by making the comparison lines more similar in length. This meant that the correct answer was less obvious.

When the task became more difficult, conformity increased. Participants were less certain about their own judgment, so they were more likely to go along with the group.

This shows that conformity is not only affected by the social group itself. It is also affected by how confident people feel about the task they are doing. If a judgment is clear and easy, people can rely on their own answer. If it is more ambiguous, the majority becomes more influential.

Task difficulty is therefore important because it changes the level of uncertainty. Higher uncertainty makes individuals less sure of themselves and more likely to follow the majority response.

What Asch’s variables show

Taken together, these variables show that conformity is strongly affected by the immediate situation rather than being a constant personal tendency.

The findings suggest that conformity is most likely when:

• the majority is at least three people

• the majority is unanimous

• the task is difficult or unclear

They also show that conformity becomes less likely when:

• the majority is small

• someone breaks unanimity

• the task is easy and the correct answer is obvious

For AQA, it is important to link each variable directly to Asch’s research findings. Group size increased conformity up to three confederates. Unanimity was crucial, because a dissenter greatly reduced conformity. Task difficulty increased conformity by making participants less certain about the correct answer.