45
" In the statistical gargon used in psychology, p refers to the probability that the difference you see between two groups (of introverts and extroverts, say, or males and females) could have occurred by chance. As a general rule, psychologists report a difference between two groups as 'significant' if the probability that it could have occurred by chance is 1 in 20, or less. The possibility of getting significant results by chance is a problem in any area of research, but it's particularly acute for sex differences research. Supppose, for example, you're a neuroscientist interested in what parts of the brain are involved in mind reading. You get fifteen participants into a scanner and ask them to guess the emotion of people in photographs. Since you have both males and females in your group, you rin a quick check to ensure that the two groups' brains respond in the same way. They do. What do you do next? Most likely, you publish your results without mentioning gender at all in your report (except to note the number of male and female participants). What you don't do is publish your findings with the title " No Sex Differences in Neural Circuitry Involved in Understanding Others' Minds." This is perfectly reasonable. After all, you weren't looking for gender difference and there were only small numbers of each sex in your study. But remember that even if males and females, overall, respond the same way on a task, five percent of studies investigating this question will throw up a " significant" difference between the sexes by chance. As Hines has explained, sex is " easily assessed, routinely evaluated, and not always reported. Because it is more interesting to find a difference than to find no difference, the 19 failures to observe a difference between men and women go unreported, whereas the 1 in 20 finding of a difference is likely to be published." This contributes to the so-called file-drawer phenomenon, whereby studies that do find sex differences get published, but those that don't languish unpublished and unseen in a researcher's file drawer. "
48
" According to scientists, there are three stages of love: lust, attraction, and attachment. And, it turns out, each of the stages is orchestrated by chemicals—neurotransmitters—in the brain.
As you might expect, lust is ruled by testosterone and estrogen.
The second stage, attraction, is governed by dopamine and serotonin. When, for example, couples report feeling indescribably happy in each other’s presence, that’s dopamine, the pleasure hormone, doing its work.
Taking cocaine fosters the same level of euphoria. In fact, scientists who study both the brains of new lovers and cocaine addicts are hard-pressed to tell the difference.
The second chemical of the attraction phase is serotonin. When couples confess that they can’t stop thinking about each other, it’s because their serotonin level has dropped. People in love have the same low serotonin levels as people with OCD. The reason they can’t stop thinking about each other is that they are literally obsessed.
Oxytocin and vasopressin control the third stage: attachment or long-term bonding. Oxytocin is released during orgasm and makes you feel closer to the person you’ve had sex with. It’s also released during childbirth and helps bond mother to child. Vasopressin is released postcoitally.
Natasha knows these facts cold. Knowing them helped her get over Rob’s betrayal. So she knows: love is just chemicals and coincidence.
So why does Daniel feel like something more? "
― Nicola Yoon , The Sun Is Also a Star
57
" When we retire at night, we constructively review our day. Were we resentful, selfish, dishonest or afraid? Do we owe an apology? Have we kept something to ourselves which should be discussed with another person at once? Were we kind and loving toward all? What could we have done better? Were we thinking of ourselves most of the time? Or were we thinking of what we could do for others, of what we could pack into the stream of life? But we must be careful not to drift into worry, remorse or morbid reflection, for that would diminish our usefulness to others. After making our review we ask God’s forgiveness and inquire what corrective measures should be taken.On awakening let us think about the twenty-four hours ahead. We consider our plans for the day. Before we begin, we ask God to direct our thinking, especially asking that it be divorced from self-pity, dishonest or self-seeking motives. Under these conditions we can employ our mental faculties with assurance, for after all God gave us brains to use. Our thought-life will be placed on a much higher plane when our thinking is cleared of wrong motives.In thinking about our day we may face indecision. We may not be able to determine which course to take. Here we ask God for inspiration, an intuitive thought or a decision. We relax and take it easy. We don’t struggle. We are often surprised how the right answers come after we have tried this for a while.What used to be the hunch or the occasional inspiration gradually becomes a working part of the mind. Being still inexperienced and having just made conscious contact with God, it is not probable that we are going to be inspired at all times. We might pay for this presumption in all sorts of absurd actions and ideas. Nevertheless, we find that our thinking will, as time passes, be more and more on the plane of inspiration. We come to rely upon it. We usually conclude the period of meditation with a prayer that we be shown all through the day what our next step is to be, that we be given whatever we need to take care of such problems. We ask especially for freedom from self-will, and are careful to make no request for ourselves only. We may ask for ourselves, however, if others will be helped. We are careful never to pray for our own selfish ends. Many of us have wasted a lot of time doing that and it doesn’t work. You can easily see why. "
60
" Our brains resist change, they rail against it, our amygdala will always want the safe bet. But are the obstacles truly insurmountable? Is it a brick wall? Or is it a sliding door, which, once you decide to approach it, begins to swish open? Because even though our brains prefer safety in the short run, in the long run they crave meaning, challenge, and novelty. "
― , Life Reimagined: The Science, Art, and Opportunity of Midlife
