Category: Personal World

Social Loafing: Getting Groups to Work Well Together

PsyBlog has an excellent summary of the research on social loafing, the phenomena where people working in a group work less compared to when they work alone. Because we do so much group work, this is sometimes an issue.

The first research on social loafing came from Max Ringelmann way back in 1913 (Ringelmann, 1913). He had people pulling on a rope, and compared the maximum they could have pulled, based on individual test, to how much each person actually pulled. The results were, kind of, sad; with eight people, each one only pulled half as much as their maximum potential strength. A graph of Ringelmann’s data is shown below. If everyone pulled at their maximum the line would have stayed horizontal at 1.

The relative loafing of people working in a group. As the group gets larger, the amount of work per person decreases from its maximum of 1. Data from Ringelmann (1913)

The PsyBlog article points out three reasons why people tend to loaf in groups:

  • We expect others to loaf so we do it, too.
  • We feel more anonymous the larger the group, so we feel less need to put in the effort.
  • We often don’t have a clear idea about how much we need to contribute, so we don’t put in as much as we could.

This can be summed up in Latane’s Social Theory:

If a person is the target of social forces, increasing the number of other persons diminishes the relative social pressure on each person.

— Latane et al., 1979: Many hands make light the work: The causes and consequences of social loafing in the Journal of Personality and Social Psycology. Quote via Keith Rolag’s Website.

How do we deal with this

The key is making sure students are motivated to do the work. We want self-motivated students, but creating the right environment, especially by training students in how to work in a group will help.

  • Make sure students realize the importance of their work; this makes them more motivated.
  • Build group cohesion; team members contribute more if they value the group they’re in.
  • Make sure the group clearly and fairly divides the work. Let everyone be part of the decision making process so students have choices in what to do will help them be more invested in their part of the work.
  • Make sure each group member feels accountable for their share of the work.

A Brief Excursion into Mathematics

Ringelmann’s data falls on a remarkably straight line, so I used Excel to plot a trendline. As my algebra students know, you only need two points to write the equation of a line, however, Excel uses linear regression to get the best-fit line through all the data. Not all the data points will be on the line (sometimes none of them will be on the line) but the sum of the distance from each point to the line is minimized.

Curiously, since the data is pretty close to a straight line, you can extend the line to the x-axis to find out how many people it would take for no-one to be exerting any force at all. Students should be able to determine the equation of the line on their own, but you can get Excel to give you the equation of the trendline. From the plot we see:

y = -0.0732 x + 1.0707

At the x-axis, y = 0, so;

0 = -0.0732 x + 1.0707

solving for x we first subtract the constant, 1.0707 from both sides to get:

0 – 1.0707 = -0.0732 x + 1.0707 – 1.0707

giving:

-1.0707 = -0.0732 x

then divide by -0.0732 to isolate x:

! \frac{-1.0707}{-0.0732} = \frac{-0.0732 x}{-0.0732}

which yields:

x = 14.63

This means that with 15 people, no-one will be pulling on the rope. In fact, according to this equation, they’ll actually start pushing on the rope.

It’s an amazing result, but if you can find flaws with my argument or math, please let me know.

Enjoy the Silence

… an emerging body of research is suggesting that spending time alone, if done right, can be good for us — that certain tasks and thought processes are best carried out without anyone else around, and that even the most socially motivated among us should regularly be taking time to ourselves if we want to have fully developed personalities, and be capable of focus and creative thinking [my emphasis].

–Leon Neyfakh (2010): The Power of Lonely in The Boston Globe.

Every day (almost) we have half an hour blocked off for Personal World. It’s a time for reflection, a time to collect ourselves, and a time to be alone. Adolescents in general tend to be social animals, but, as Leon Neyfkh points out:

… a certain amount of solitude has been shown to help teenagers improve their moods and earn good grades in school.

–Leon Neyfakh (2010): The Power of Lonely in The Boston Globe.

Neyfakh’s article provides a nice roundup of research into the importance of solitude.

Poor Mom

My students are playing SPENT (previous post), and some of them have figured out how to easily make it to the end of the month even while living in poverty. Unfortunately, lots of moms are going without crucial medication.

At least this will contribute to a nice discussion of ethics and morality.

Velasquez and other, (2010) have a nice explanation of “What is Ethics?“.

Ethics is two things. First, ethics refers to well-founded standards of right and wrong that prescribe what humans ought to do, usually in terms of rights, obligations, benefits to society, fairness, or specific virtues. … Secondly, ethics refers to the study and development of one’s ethical standards. … feelings, laws, and social norms can deviate from what is ethical. So it is necessary to constantly examine one’s standards to ensure that they are reasonable and well-founded.

—Velasquez et al., 2010: What is Ethics?

While the Stanford Encyclopedia of Philosophy has a great definition of morality:

The term “morality” can be used either
1. descriptively to refer to a code of conduct put forward by a society or,
— 1. some other group, such as a religion, or
— 2. accepted by an individual for her own behavior or
2. normatively to refer to a code of conduct that, given specified conditions, would be put forward by all rational persons.

—Gert (2008): The Definition of Morality (The Stanford Encyclopedia of Philosophy)

In fact, given how difficult it is to win the game without making some hard moral choices, a couple very interesting questions for a Socratic dialogue would be,

“Can someone survive in poverty while living ethically?”

and, to follow up,

“Does this push poorer people into being unethical and immoral, and towards crime?”

I’m curious to see where a dialogue might lead, especially if it leads back to our discussions of wealth distribution.

The scientific explanation of why adolescents know everything!

The central proposition in our argument is that incompetent individuals lack the metacognitive skills that enable them to tell how poorly they are performing, and as a result, they come to hold inflated views of their performance and ability…. the way to make incompetent individuals realize their own incompetence is to make them competent.
– Kruger and Dunning (1999): Unskilled and Unaware of It: How Difficulties in Recognizing One’s Own Incompetence Lead to Inflated Self-Assessments (pdf)

If you don’t know what you’re doing, then it’s quite likely that you don’t know that you don’t know. Kruger and Dunning (1999) did a set of interesting studies to show this to be the case. It explains why people with the least information and knowledge about a subject may feel the most confident to opine about it.

It kind of explains why adolescents know everything. I know that I knew everything when I was 12, and ever since then I’ve been knowing less and less.

Of course there are the less typical teenagers who don’t express the same unaware overconfidence. They can be extremely competent at a particular thing (let’s call it a domain), like writing to take a purely random example, yet are extremely unconfident of their ability.

Well Kruger and Dunning (1999) have an explanation for that too. Competent people tend to think everyone else is competent too, so they tend too underestimate their ability relative to everyone else.

Teachers can easily fall into a similar trap, because we will often, quite unintentionally and unconsciously, assume students know more than they do. This is one of the reasons peer-teaching works so well. Students are more likely to know where their peers are coming from, and what they know to begin with.

The NY Times’ Errol Morris has a great interview with one of this study’s authors.

I’ll end with the most wonderful concluding remarks, which really put this whole study in perspective:

In sum, we present this article as an exploration into why people tend to hold overly optimistic and miscalibrated views about themselves. We propose that those with limited knowledge in a domain suffer a dual burden: Not only do they reach mistaken conclusions and make regrettable errors, but their incompetence robs them of the ability to realize it. Although we feel we have done a competent job in making a strong case for this analysis, studying it empirically, and drawing out relevant implications, our thesis leaves us with one haunting worry that we cannot vanquish. That worry is that this article may contain faulty logic, method- ological errors, or poor communication. Let us assure our readers that to the extent this article is imperfect, it is not a sin we have committed knowingly.
—Kruger and Dunning (1999)

Student blog update

Well, I’ve made sure that everyone who wants one has a blog, and I’m still finding that the girls are the ones who’re updating them while the boys are not.

This is a small class, so we can’t have any statistical confidence in this observation, but for now at least, the trend continues.

I have also noticed that some of my bloggers are using their Personal World time to blog. I did not require this, or even suggest it, but I think this is great because they’re doing exactly the type of self-reflection that Personal World is intended to elicit.

Islands of peace in a revolution

From the Guardian’s live feed of the uprising in Egypt:

A protester approaches the police to organize a cease-fire for the evening prayer. (Screengrab from Al Jezeera via The Guardian)
Prayer as protest (via The Daily Dish)

And who are the police? Who’s side are they on?

An Egyptian anti-government activist kisses a riot police officer following clashes in Cairo. Photograph: Lefteris Pitarakis/AP (via The Guardian live updates)

It reminds me of this picture from the protests last November in London over university tuition increases:

Schoolgirls join hands to peacefully stop attacks on a police van during student protests in London. Photograph: Demotix/Peter Marshall (via The Guardian)

So some questions:

  • What would it take for you to go out and protest (have you done it before)?
  • What would you do under these circumstances?

“The only time anyone fails is when they are scared to try”

“[My father] used to say it was better to fail through lack of ability than lack of effort,” he says. “He also said fear of failure was something you had to go through because the only time anyone fails is when they are scared to try.”
— Ian Holloway in The Guardian

One of the things I really like about European (and other) soccer leagues is the relegation and promotion system. It encourages competition, and the dream that one day your small town side can make it up the the big leagues. Or as in Blackpool’s case, return to the top after thirty years in the lower divisions.

When they barely qualified for the top English division last year, it was widely expected that they would set records for most goals conceded, and be the first team to be relegated. But they’ve done well enough. They’re well out of the relegation zone at the moment and have impressed, even though they’re still playing in the smallest stadium and have the cheapest team. So their coach, Ian Holloway, knows something about facing potential embarrassment, and the fear of failure.

Keeping with our theme of graphing for this cycle, here is a graph showing the position of Blackpool in the English football leagues. Each league has about 20 teams so the graph shows a range of about four divisions. (From Wikipedia user Dudesleeper).

Moral Development in the Brain

If someone takes something of yours from your locker, does it matter if they intended to steal, or if they grabbed it by mistake because they thought it was their locker? We see there is a moral difference here, because people’s intentions and beliefs matter. An inadvertent mistake is one thing, but intentionally stealing is another.

We can see the difference, but typically, children under six do not. They see both things as just as bad, because they do not consider intentions.

The temporoparetial junctions. Image by the Database Center for Life Science, via Wikimedia Commons.

A recent study (Young et al., 2010) found the part of the brain that seems to be responsible for the consideration of intentions in moral judgment. This part of the brain, the right temporoparietal junction, develops between the ages of six and eleven.

I find this work fascinating because it implies that adolescents may still be developing the ability for deeper moral judgment when they get to middle school. It would help explain why they will sometimes make the argument that if the outcome did no harm then any transgression does not matter; taking something from someone’s locker is not that important if they get caught at it and have to return it.

Just like adolescents have to exercise our abstract thinking skills in order to fully develop and hone them, students probably need to practice and think about what morality means.

I think I’m going to have to figure out a framework for talking about morality for next cycle’s Personal World.

Note: Another interesting article on the role of the temporoparietal junction in meta-cognition.