Introduction: Can We Trust What We See?
Welcome! In this chapter, we are going to dive into a fascinating study by Pozzulo et al. (2011). Have you ever seen a movie where a witness points at a line of people and says, "That’s the one!"? This study looks at how accurate that process really is, especially when we compare children to adults.
Since this is part of the Cognitive Approach, we are focusing on memory. Specifically, we are looking at how our brains process, store, and "fetch" the faces of people we’ve seen before. Understanding this helps us know how much we can trust eyewitnesses in real court cases.
The Psychology: Why This Matters
The main idea being investigated is eyewitness testimony. In the legal system, we often rely on what people remember. However, memory isn't like a video recording; it can be "reconstructed" or changed. Pozzulo was particularly interested in false positive responses—this is when a person points to someone in a line-up and says "That's him!" even though the actual "criminal" isn't even there!
Quick Review Box:
Eyewitness Testimony: A legal term for when a person describes what they saw during a crime.
Cognitive Approach: Focuses on mental processes like memory and perception.
The Background: Kids vs. Adults
Before this study, researchers knew that children were often less accurate than adults when identifying people. But why? Is it because their memory is worse, or is it because they feel social pressure to please the adults asking the questions?
Pozzulo wanted to see if children would be better at identifying faces they were familiar with (like cartoon characters) compared to strangers (human targets).
Aims of the Study
The study had a few main goals:
1. To see if children are less accurate than adults when the "target" (the person they saw) is absent from the line-up.
2. To see if the type of target (a cartoon character vs. a human) makes a difference in how well people remember.
Key Terms to Know
Don't worry if these seem tricky at first! Here is a simple breakdown:
- Target: The person/character the participant is supposed to remember.
- Foil: People in the line-up who look similar to the target but are NOT the target (they are innocent).
- Target-Present Line-up: The real "criminal" is actually in the line-up.
- Target-Absent Line-up: The real "criminal" is NOT in the line-up. The witness should say "none of them."
Memory Aid: Think of a "Foil" as someone trying to "foil" or trick your memory!
The Procedure: What Happened?
The researchers used a laboratory experiment. This means they had a lot of control over the environment.
1. The Participants
They compared two groups:
- Children: About 59 kids (average age 4-5 years old).
- Adults: About 53 university students.
2. The Materials
Participants watched short video clips. There were two types of "targets" to remember:
- Cartoon Targets: Characters like Dora the Explorer or Goof (high familiarity).
- Human Targets: A male or female stranger shown in a video (low familiarity).
3. The Line-up Task
After watching the clips, participants were shown a photo line-up (4 photos at a time).
- In some trials, the character/person was there (Target-Present).
- In other trials, the character/person was NOT there (Target-Absent).
Participants were asked: "Is the person/character here? If so, point to them. If not, point to the 'Not Here' box."
The Results: What Did They Find?
The results were very clear, especially regarding the Target-Absent line-ups!
1. Target-Present (The "Criminal" is there)
When the target was actually in the line-up, kids and adults were fairly similar. They were both pretty good at picking out the right face, especially for cartoons.
2. Target-Absent (The "Criminal" is NOT there)
This is where the big difference happened!
- Adults were much better at saying "he's not there."
- Children were much more likely to pick a foil (an innocent person) and say "That's him!" This is a false positive.
3. Cartoons vs. Humans
Both kids and adults were more accurate with cartoon characters than with human faces. This suggests that the "simpler" features of cartoons are easier for our brains to process and store.
Quick Summary Table:
- Target Present: Kids and Adults = Similar accuracy.
- Target Absent: Kids = Low accuracy (picked someone anyway); Adults = High accuracy.
- Cartoons: Higher accuracy for everyone.
Conclusions: The "Social Pressure" Factor
Why did the kids keep picking someone even when the target wasn't there? Pozzulo concluded that children might feel a social demand. They think: "The grown-up is asking me to find the person, so I must find someone!" Their cognitive process is influenced by the situational factor of wanting to be helpful or obedient.
Evaluation: Strengths and Weaknesses
To do well in Psychology 9990, you need to be able to "critique" the study.
Strengths
- Standardisation: Everyone watched the same videos and saw the same photos. This makes the study reliable (it can be repeated).
- Controls: By using both cartoons and humans, the researchers could prove that the "type" of face matters, not just the child's age.
Weaknesses
- Ecological Validity: Watching a video of Dora the Explorer is not the same as witnessing a real, scary crime. In real life, stress and fear might change how memory works.
- Sample: The adults were all university students, who might have better memories or test-taking skills than the average person.
Common Mistakes to Avoid
- Confusing the line-ups: Many students forget that the kids did fine when the target was actually there. The "problem" is only when the target is absent.
- Thinking cartoons were a distraction: The cartoons weren't there to distract; they were used to see if familiarity helped memory. (It did!).
Key Takeaways
1. Memory is a cognitive process that can be influenced by age.
2. Children are prone to false positives in line-ups because they feel they must choose someone.
3. We are generally better at remembering cartoon/simple faces than complex human faces.
4. Legal systems should be very careful when using children as witnesses, especially if the suspect might not be in the line-up!