The phrase "a joint activity" is correct and usable in written English.
It can be used to describe an action or task that is performed collaboratively by two or more individuals or groups.
Example: "The community organized a joint activity to clean up the local park, bringing together volunteers from various neighborhoods."
Alternatives: "a collaborative effort" or "a shared endeavor".
For how can an individual refer to a joint activity without the jointness, i.e., the 'we,' already being in place?
In DA, teaching and testing are intertwined into a joint activity which targets the activation of the learners' cognitive and metacognitive processes (Ableeva & Lantolf 2011; Tzuriel 2011, p.115).
He is a lieutenant, junior grade, in the Navy, serving as a nuclear engineer in the Office of Naval Reactors, a joint activity of the Department of Energy and the Department of the Navy in Washington.
(5) Doing means the use of language or other semiotics to collaborate with others or direct others to finish a joint activity or task.
As a group of learners engaged in a joint activity, their success is related to a combination of individual knowledge and skills, environment, use of tools and ability to work together (Wells and Claxton 2008; Wertsch et al. 1995).
A conceptual design development of an accelerator-driven subcritical facility has been carried out in the preparation of a joint activity with Kharkov Institute of Physics and Technology of Ukraine.
During an optional joint activity (walk in the woods) at the start of the day the participants experiment with physical challenges and with the management of their energy.
All artistic work, like all human activity, involves the joint activity of a number, often a large number, of people.
doing: contexts where people are engaged in a joint social activity, using language to facilitate the performance of this activity.
doing: contexts where people are engaged in a joint social activity, using language to facilitate the performance of this activity — either by members of one group collaborating with one another or by one person directing the other members of a group.
Currently, the joint activity of a combination is quantified by comparing the observed and expected effects using a reference model.
