Conversation threading

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Thread view in a discussion group. At the top level, a discussion with several posts. Next to the subject, number of lines, sender and date is shown for each post.

Conversation threading is a feature used by many email clients, bulletin boards, newsgroups, and Internet forums in which the software aids the user by visually grouping messages with their replies. These groups are called a conversation, topic thread, or simply a thread. A discussion forum, e-mail client or news client is said to have a "conversation view", "threaded topics" or a "threaded mode" if messages can be grouped in this manner.[1]

Threads can be displayed in a variety of ways. Early messaging systems (and most modern email clients) will automatically include original message text in a reply, making each individual email into its own copy of the entire thread. Software may also arrange threads of messages within lists, such as an email inbox. These arrangements can be hierarchical or nested, arranging messages close to their replies in a tree, or they can be linear or flat, displaying all messages in chronological order regardless of reply relationships.

Conversation threading as a form of interactive journalism became popular on Twitter from around 2016 onward. Authors, such as Eric Garland and Seth Abramson, began to post essays in real time, constructing them as a series of numbered tweets, each limited to 140 or 280 characters.[2]

Advantages

Eliminates turn-taking & time constraints

Threaded discussions allow readers to quickly grasp the overall structure of a conversation, isolate specific points of conversations nested within the threads, and as a result, post new messages to extend discussions in any existing thread or sub-thread without time constraints. With linear threads on the other hand, once the topic shifts to a new point of discussion, users are: 1) less inclined to make posts to revisit and expand on earlier points of discussion in order to avoid fragmenting the linear conversation similar to what occurs with turn-taking in face-to-face conversations; and/or 2) obligated to make a motion to stay on topic or move to change the topic of discussion. Given this advantage, threaded discussions is most useful for facilitating extended conversations or debates [3] involving complex multi-step tasks (e.g., identify major premises → challenge veracity → share evidence → question accuracy, validity, or relevance of presented evidence) – as often found in newsgroups and complicated email chains – as opposed to simple single-step tasks (e.g., posting or share answers to a simple question).

Message targeting

Email allows messages to be targeted at particular members of the audience by using the "To" and "CC" lines. However, some message systems do not have this option. As a result, it can be difficult to determine the intended recipient of a particular message. When messages are displayed hierarchically, it is easier to visually identify the author of the previous message.

Eliminating list clutter

It can be difficult to process, analyze, evaluate, synthesize, and integrate important information when viewing large lists of messages. Grouping messages by thread makes the process of reviewing large numbers of messages in context to a given discussion topic more time efficient and with less mental effort, thus making more time and mental resources available to further extend and advance discussions within each individual topic/thread.

In group forums, allowing users to reply to threads will reduce the number of new posts shown in the list.

Some clients allow operations on entire threads of messages. For example, the text-based newsreader nn has a "kill" function which automatically deletes incoming messages based on the rules set up by the user matching the message's subject or author. This can dramatically reduce the number of messages one has to manually check and delete.

Real time feedback

When an author, usually a journalist, posts threads via Twitter, users are able to respond to each 140- or 280-character tweet in the thread, often before the author posts the next message. This allows the author the option of including the feedback as part of subsequent messages.[2]

Disadvantages

Reliability

Accurate threading of messages requires the email software to identify messages that are replies to other messages.

Some algorithms used for this purpose can be unreliable. For example, email clients that use the subject line to relate messages can be fooled by two unrelated messages that happen to have the same subject line.[4]

Modern email clients use unique identifiers in email headers to locate the parent and root message in the hierarchy. When non-compliant clients participate in discussions, they can confuse message threading as it depends on all clients respecting these optional mail standards when composing replies to messages.[5][6]

Individual message control

Messages within a thread do not always provide the user with the same options as individual messages. For example, it may not be possible to move, star, reply to, archive, or delete individual messages that are contained within a thread.

The lack of individual message control can prevent messaging systems from being used as to-do lists (a common function of email folders). Individual messages that contain information relevant to a to-do item can easily get lost in a long thread of messages.

Parallel Discussions

With conversational threading, it is much easier to reply to individual messages that are not the most recent message in the thread. As a result, multiple threads of discussions often occur in parallel. Following, revisiting, and participating in parallel discussions at the same time can be mentally challenging. Following parallel discussions can be particularly disorienting and can inhibit discussions [7] when discussion threads are not organized in a coherent, conceptual, or logical structure (e.g., threads presenting arguments in support of a given claim under debate intermingled with threads presenting arguments in opposition to the claim).

Temporal Fragmentation

Thread fragmentation can be particularly problematic for systems that allow users to choose different display modes (hierarchical vs. linear). Users of the hierarchical display mode will reply to older messages, confusing users of the linear display mode.

Examples

The following messaging software can group and display messages by thread.

Client-based

Web-based

See also

  • Document mode, a contrasting method which only displays the result of the last page update.

References

  1. ^ Hines, Elise (2017-05-05). "What Is an Email Thread?". Lifewire. Retrieved 2017-12-18.
  2. ^ a b Heffernan, Virginia. "The Rise of the Twitter Thread". POLITICO Magazine. Retrieved 2019-05-07.
  3. ^ Jeong, Allan (2005). "The combined effects of response time and message content on growth patterns of discussion threads in computer-supported collaborative argumentation". International Journal of E-Learning & Distance Education. 19 (1).
  4. ^ Bienvenu, David. "Mail with strict threading like news". Bugzilla. Mozilla. Retrieved 16 May 2017.
  5. ^ Resnick, Peter W. (October 2008). "Internet Message Format". IETF Tools. Archived from the original on 2019-04-24. Retrieved 2019-04-24.
  6. ^ Klyne, Graham; Palme, Jacob (March 2005). "Registration of Mail and MIME Header Fields". IETF Tools. Archived from the original on 2019-04-24. Retrieved 2019-04-24.
  7. ^ Brooks, D. & Jeong, A. (2006). "Brooks, C. D., & Jeong, A. (2006). Effects of pre‐structuring discussion threads on group interaction and group performance in computer‐supported collaborative argumentation". Distance Education. 27 (3): 371–390.CS1 maint: multiple names: authors list (link)
  • Horton, Sarah (2000). Web teaching guide: A practical approach to creating course web sites. New Haven, CT: Yale University Press. ISBN 978-0300087277. cited in "Taking discussion online". dartmouth.edu. 2001. Archived from the original on 4 March 2010.
  • Wolsey, T. DeVere, "Literature discussion in cyberspace: Young adolescents using threaded discussion groups to talk about books. Reading Online, 7(4), January/February 2004. Retrieved 2007-12-30.
  • Network Working Group,IETF (June 2008). "Internet Message Access Protocol - SORT and THREAD Extensions". Retrieved 2009-10-10.
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