4 . A new study published in the Journal of Marriage and Family claims that all that time you spend parenting just doesn’t matter. But it’s a claim that, despite the enthusiastic and widespread coverage by the media, does not hold water.

The research suggests that child outcomes (including behavior problems, emotional problems, and academic performance) are barely connected with the time that parents spend with their children. The researchers examined the time diaries of 1,600 children, looking at parenting time and outcomes when the kids were aged 3 to 11 in 1997, and again in 2002, when they were between 8 and 16. (A time diary is a detailed report of all activities you carry out in a day. )

This research largely reflects the failure of the authors to correctly measure parental input. It just looked at time diaries from two particular days-one a weekday and the other a weekend day.

Trying to get a sense of the time you spend parenting from a single day’s diary is a bit like trying to measure your income from a single day. If yesterday was payday, you looked rich, but if it’s not, you would be reported as poor. You get a clearer picture only by looking at your income — or your parenting time—over a more meaningful period.

What you did yesterday should not be taken as representative of what you did last year, This is why most high-quality studies of parenting time focus instead on how often parents read to their children, play with them or help their with homework over a period of a month or longer — long enough to represent their different approaches to parenting.

As an exhausted parent who doesn’t get enough time to work out, and who hasn’t seen a movie for months, I understand why so many of us might seize on studies suggesting that we should take more time for ourselves. Perhaps we should. But I agree with Ariel Kalil, a developmental psychologist, on the suggestion “that when parents spend high-quality time with their children, their children are more likely to succeed.”

5 . I’ve worked in the factories surrounding my hometown every summer since I graduated from high school, but making the transition between school and full-time blue-collar work during the break never gets any easier. For a student like me who considers any class before noon to be uncivilized, getting to a factory by 6 o’clock each morning is torture. My friends never seem to understand why I’m so relieved to be back at school or that my summer vacation has been anything but a vacation.

There’re few people as self-confident as a college student who has never been out in the real world. People of my age always seem to overestimate the value of their time and knowledge. In fact, all the classes did not prepare me for my battles with the machine I ran in the plant, which would jam whenever I absent-mindedly put in a part backward or upside down.

The most stressful thing about blue-collar life is knowing your job could disappear overnight. Issues like downsizing and overseas relocation had always seemed distant to me until my co-workers told me that the unit I was working in would shut down within six months and move to Mexico, where people would work for 60 cents an hour.

After working 12-hour shifts in a factory, the other options have become only too clear. When I’m back at the university, skipping classes and turning in lazy re-writes seems too irresponsible after seeing what I would be doing without school. All the advice and public-service announcements about the value of an education that used to sound stale (老掉牙的) now ring true.

These lessons I’m learning, however valuable, are always tinged (带有) with sense of guilt. Many people pass their lives in the places I briefly work, spending 30 years where I spend only two months at a time. “This job pays well, but it’s hell on the body,” said one co-worker. “Study hard and keep reading,” she added.

My experiences in the factories have inspired me to make the most of my college years before I enter the real world for good.