mixed practice, whereas 80 percent performed in a manner that proved the opposite. The feeling of learning, it turns out, is based on before-your-eyes progress, while deep learning is not. “When your intuition says block,” Kornell told me, “you should probably interleave.”
For general riding and travel, William used a light ‘palfrey’, while a stout and stocky ‘sumpter’ carried baggage, weapons and armour. However, Marshal’s most valuable mount was his destrier or warhorse – the animal ridden in combat. These cost anywhere from £40 to £100, sometimes even more. Working from the rates current in the 1160s, for the average price of one destrier William could have purchased either 40 palfreys, 200 packhorses, 500 oxen or a staggering 4,500 sheep.
Struggling to retrieve information primes the brain for subsequent learning, even when the retrieval itself is unsuccessful. The struggle is real, and really useful. “Like life,” Kornell and team wrote, “retrieval is all about the journey.”
a lovely riff from, he says, a Mississippi state senator, asked in 1958 how he felt about whisky: If, when you say whiskey, you mean the devil’s brew, the poison scourge, the bloody monster that defiles innocence, yea, literally takes the bread from the mouths of little children; if you mean the evil drink that topples the Christian man and woman from the pinnacles of righteous, gracious living into the bottomless pit of degredation and despair, shame and helplessness and hopelessness, then certainly I am against it with all my power. But if, when you say whiskey, you mean the oil of conversation, the philosophic wine, the stuff that is consumed when good fellows get together, that puts a song in their hearts and laughter on their lips and the warm glow of contentment in their eyes; if you mean Christmas cheer; if you mean the stimulating drink that puts the spring in the old gentleman’s step on a frosty morning; if you mean the drink that enables a man to magnify his joy, and his happiness and to forget, if only for a little while, life’s great tragedies and heartbreaks and sorrows, if you mean that drink, the sale of which pours into our treasuries untold millions of dollars, which are used to provide tender care for our little children, our blind, our deaf, our dumb, our pitiful aged and infirm, to build highways, hospitals, and schools, then certainly I am in favor of it. This is my stand. I will not retreat from it; I will not compromise.
The best theory going today about what really causes hangovers is that they are an inflammatory response, like what happens when we get an infection. Hangovers are accompanied by elevated levels of molecules called cytokines, molecules used as communications signals by the immune system. One research team in Korea found elevated levels of interleukin-10, interleukin-12, and interferon gamma in their hung-over subjects. If you inject those into a healthy subject, that person will start to have all kinds of familiar-sounding symptoms, including nausea, gastrointestinal distress, headache, chills, and fatigue. Potentially even more interesting, higher-than-normal cytokine levels also mess up memory formation, which might account for ethanol-related lapses in recall as well.
the Fourth Law of Organizational Development: whenever there is a painful, troubled time in the organization, a developmental transition is probably going on. The terrible morale, the intragroup conflicts, or the sudden drop in productivity that you’re trying to deal with are just symptoms of that transition and the toll it is taking on people. If such troubles are very disruptive, you may try to avoid making the transition.
things start when the plan says they will, but the new beginning takes place much more slowly. If transition is mishandled or if it is overlooked completely, beginnings often fail to take place. In such cases, we say that “the change didn’t work,” or that it “fell short of our expectations.”
