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1. An act that requires use of resources or time. In Program Evaluation and Review Technique (PERT), an activity is represented by an arrow on a PERT chart.

2. In investing, the amount of a security's relative trading volume; that is, the amount of money flowing into and out of a security in trading. A high amount of activity means that many shares of the security are being bought and sold at a high rate, while a low level of activity indicates the opposite.


The amount of relative trading volume in a security.
References in periodicals archive ?
Physiotherapists delivering the experimental intervention received 2 days of training, which focused on the specific skills necessary to provide behavioural graded activity. Physiotherapists in the experimental group were also supported and advised by phone and meetings during the study.
We found a 5.3 fold in the short term and 2.9 fold in the long term greater odds of people receiving behavioural graded activity meeting the recommendation for physical activity compared with those receiving usual care, mainly due to an increase in the amount of time spent walking in the behavioural graded activity.
In conclusion, behavioural graded activity with booster sessions results in better exercise adherence and a greater amount of physical activity than usual physiotherapy intervention, both in the short- and long-term.
Furthermore, there are a variety of other CBT strategies, such as graded activity scheduling, activity pacing, and goal setting that can be incorporated into the counselling process.