Wednesday, July 18, 2012

What New Brain Research Tells Us About How Children Learn: An Interview with Dr. Judy Willis, Part 2

By Sam Piha

Judy Willis is a leading thinker on how to apply new brain research to better promote children's learning. Below is part 2 of an interview with Dr. Willis. Check out her video on Edutopia, which we aired at the How Kids Learn conference.
Q: You make the case that collaborative learning opportunities are particularly important during adolescence. Why is this? 

A: Consider the increased comfort and enjoyment that youth have when pleasurable social interaction is incorporated into their learning experience. This is especially true during adolescence when peer group influence plays such an important developmental role in the psychosocial process of separation from parents along the road to individualization. For example, in early elementary school youth often raise up from their seats when they wave their hands enthusiastically in hopes of being called upon to answer a question. By middle school some youth consider it uncool to volunteer answers or even appear smart in class. These same youth are more willing to participate and even show enthusiasm about challenging tasks when they are engaged in learning activities with supportive cooperative groups. 

Erik Erikson’s theorized that the developmental crises of adolescence are turning points during periods of increased vulnerability and these turning points present opportunities for the development of psychosocial strength. He proposed that during these developmental stages the adolescent develops new capacities and psychosocial strengths by working through these crises. Inclusion, a sense of belonging to a group where a student feels valued, builds resiliency. Resilient adolescents have greater success, social competence, empathy, responsiveness, and communication skills. They also demonstrate greater flexibility, self-reflection, and ability to conceptualize abstractly when solving problems. 

Successfully planned group work can help to support youth during these developmental crisis opportunities by reducing the fear of failure that can cause them to avoid academic challenges. Well-structured cooperative group activities build supportive peer communities, which in turn increase self-esteem and academic performance.

Q: Youth development specialists and educators have been saying for some time that creating a positive, low stress environment enhances the opportunities for young people to learn. Is this now confirmed by recent brain research?
A: Neuroimaging and neurochemical investigation provide evidence of the brain’s response to stress as well as to pleasure and positive social interaction. Research on the amygdala reveals it to be one location of an affective filter in the brain. During the periods of the high stress or anxiety, that some youth might feel when asked to do a math problem on the board or make an oral presentation to the class, their emotional state is associated with greatly heightened metabolism (more glucose/oxygen use) flooding this “emotional” portion of the limbic system on Functional Magnetic Resonance Imaging (fMRI) studies. 

When the amygdala is in this hyperexcitable anxiety-provoked state there is profound reduction in the neural activity indicative of information flow into and out of the amygdala. In the normal, relaxed state the brain receive information as sensory input (hearing, vision, etc.) into specific sensory receptive centers. From these areas, neural pathways project this information to the amygdala. In the amygdala emotional meaning may be linked to the information and connections are made with previously stored, related knowledge. The new information, now enhanced with emotional or relational data, then travels along specific neuronal circuits to the higher cognitive centers of the brain, such as the prefrontal cortex, where information is processed, associated, and stored for later retrieval and executive functioning. 

In MRI scans of adolescents in states of affective, emotional anxiety, when the amygdala metabolically hyperactive, the pathways that normally conduct information in and out of the amygdala show greatly reduced activity. Thus new information/learning is blocked from entering the memory banks by this metabolic blockade of the hyperactive amygdala. 

Q: How does well-designed collaborative learning help create a positive learning environment?


Q: Here, I’m going to apologize to our readers for getting somewhat technical, by asking you to explain in simple terms how information travels in the brain and the role of neurotransmitters. 

A: Information travels along nerve cells’ branching and communicating sprouts (axons and dendrites) as electrical impulses. However, where these sprouting arms connect to the next neuron in the circuit, the information has to travel through a gap between the end of one nerve and the beginning of the next one. In these gaps, called synapses, there are no physical structures, like the wires that connect appliances to electric outlets, along which the electric impulses can travel. 

When crossing over synaptic gaps, the information impulse must be temporarily converted from an electric one into a chemical one. Neurotransmitters are brain proteins released by the electrical impulse on one side of the synapse, to then float across the synaptic gap, carrying the information with them to stimulate the next nerve ending in the pathway. Once the neurotransmitter is taken up by the next nerve ending, the electric impulse is reactivated to travel along to the next nerve cell.
Dopamine is the chemical neurotransmitter most closely associated with attention, memory storage, comprehension, and executive function. The theory of reward-stimulated learning and other reinforcement learning theories are based on the assumption that the brain finds some states of stimulation to be more desirable than others. The brain is believed to make associations between specific cues and these desirable states or goals. Dopamine activity can be evaluated on neuroimaging.

Q: How is the release of dopamine related to learning? How is this related to collaborative learning activities? 
A: It has been found that dopamine release is increased in brain centers associated with learning and memory in response to rewards and positive experiences. Research found that the brain released more dopamine into these learning circuits when the individual was playing, laughing, exercising, and receiving acknowledgement (e.g. praise) for achievement. These frontal lobe dopamine sensitive regions are seen on neuroimaging as activated in pleasure and reward, wakefulness, and satiety. 



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