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　　On Jan. 9, 2007, 10 years ago today, Steve Jobs formally announced Apple's "revolutionary mobile phone" — a device that combined the functionality of an iPod, phone and Internet communication into a single unit, navigated by touch.

　　It was a huge milestone in the development of smartphones, which are now owned by a majority of American adults and are increasingly common across the globe.

　　As smartphones have proliferated, so have questions about their impact on how we live and how we work. (51) Often the advantages of convenient, mobile technology are both obvious and taken for granted, leaving more subtle topics for concerned discussion【题干问的是negative impact，more subtle= be not so obvious】: Are smartphones disturbing children's sleep? Is an inability to get away from work having a negative impact on health? And what are the implications for privacy?

　　But today, on the 10th anniversary of the iPhone, (52) let's take a moment to consider a less obvious advantage: the potential for smartphone technology to revolutionize behavioral science. That's because, for the first time in human history, a large proportion of the species is in continuous contact with technology that can record key features of an individual's behavior and environment. To quote a recent article published in Perspectives in Psychological Science: "Psychology has a great deal of data on what people believe they do... but little data on what people actually do."

　　Researchers have already begun to use smartphones in social scientific research, either to query people regularly as they engage in their normal lives or to record activity using the device's built-in sensors. These studies are confirming, challenging and extending what's been found using more(53) traditional approaches, in which people report how they behaved in real life or participate in relatively short and artificial laboratory-based tasks.

　　To illustrate the use of smartphone-based data collection, consider a forthcoming study that combined queries embedded in everyday life with sensor data to paint a more accurate picture of how mood is affected by a person's location. The data for the study came from more than 12,000 members of the general public who downloaded a free Android app to participate in the research. Twice during the day, they were prompted to report their mood and location, with location information additionally collected from the phone's location sensors. Using both kinds of location data, the study found that people reported significantly more positive moods in locations that typically involve social interactions (such as a café or friend's house) than at home, and more positive moods at home than at work.

　　Other studies have used sensor data to draw more subtle kinds of inferences. For instance, a study published in 2015 followed 48 students over the course of a 10-week school term. Using a combination of location, activity and audio sensors, the researchers could infer students' patterns of class attendance, study time, physical activity and socializing. These variables, in turn, predicted student GPA with surprisingly high accuracy. Another 2015 study used mobile phones to track 40 adult participants over a two-week period. Using patterns of movement and phone usage, the researchers were able to identify behaviors that predicted symptoms of depression.

　　These studies are just first steps. As more data are collected and methods for analysis improve, researchers will be in a better position to identify how different experiences, behaviors and environments relate to each other and evolve over time, with the potential to improve people's productivity and wellbeing in a variety of domains. (54) Beyond revealing population-wide patterns, the right combination of data and analysis can also help【benefit的同义替换】 individuals identify unique characteristics of their own behavior, including conditions that could indicate the need for some form of intervention — such as an uptick in behaviors that signal a period of depression.

　　Smartphone-based data collection comes at an opportune time in the evolution of psychological science.(55) Today, the field is in transition, moving away from a focus on laboratory studies with undergraduate participants towards more complex, real-world situations studied with more diverse groups of people.【today是current的同义替换，move away from…towards…，从……转变为……】 Smartphones offer new tools for achieving these ambitions, offering rich data about everyday behaviors in a variety of contexts.

　　So here's another way in which smartphones might transform the way we live and work: by offering insights into human psychology and behavior and, thus, supporting smarter social science.

　　51. What does the author say about the negative impact of smartphones?

　　A. It has been overshadowed bythepositive impact.

　　B. It has more often than not been taken for granted.

　　C. It is not so obvious but has caused some concern.

　　D. It is subtle but should by no means be overstated.

　　52. What is considered a less obvious advantaged of smartphone technology?

　　A. It systematically records real human interactions.

　　B. It helps people benefit from technological advances.

　　C. It brings people into closer contact with each other.

　　D. It greatly improves research on human behavior.

　　53. What characterizes traditional psychological research?

　　A. It is based on huge amounts of carefully collected data.

　　B. It relies on lab observations and participants’ reports.

　　C) It makes use of the questionnaire method.

　　D) It is often expensive and time-consuming.

　　54.How will future psychological studiesbenefitindividuals?

　　A) By helping them pin down their unusual behaviors.

　　B) By helping them maintain a positive state of mind.

　　C) By helping them live their lives in a unique way.

　　D) By helping them cope with abnormal situations.

　　55.What do we learn about current psychological studies?

　　A) They are going through a period of painful transition.

　　B) They are increasingly focused on real-life situations.

　　C) They are conducted in a more rigorous manner.

　　D) They are mainly targeted towards undergraduates.

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