The question of whether to treat the word “data” as a singular or plural noun is one of the most persistent debates in the English language, reflecting the tension between historical Latin roots and modern linguistic evolution. In contemporary writing, you will encounter various applications of the term, such as data is, data are, this data, and these data, each appearing in different professional and academic contexts. Mastering this distinction is essential for students, researchers, and professional writers who wish to maintain precision and credibility in their communication. Understanding the nuances of “data” allows you to navigate the subtle shift from its origins as a plural count noun to its modern role as a collective mass noun, ensuring your prose remains consistent and appropriate for your specific audience.
Table of Contents
- Definition and Etymological Origins
- Structural Breakdown: Count vs. Mass Nouns
- Scientific vs. General Usage Categories
- Extensive Examples of Usage
- Comprehensive Usage Rules and Exceptions
- Common Mistakes and How to Avoid Them
- Practice Exercises with Answer Key
- Advanced Topics: The Evolution of Language
- Frequently Asked Questions (FAQ)
- Conclusion and Key Takeaways
Definition and Etymological Origins
To understand why “data” causes so much confusion, we must first look at its linguistic ancestry. The word is the plural form of the Latin noun datum, which translates literally to “something given.” In classical Latin, a datum was a single piece of information, while data referred to a collection of such pieces. This historical origin is the primary reason why traditionalists and many scientific journals insist on treating the word as a plural noun.
In modern English, the definition has expanded significantly. It now refers to facts and statistics collected together for reference or analysis. In computing, it represents quantities, characters, or symbols on which operations are performed by a computer. Because we rarely deal with a single “datum” in the modern digital age, the word has transitioned in the minds of many speakers from a collection of individual units to a single, unified mass of information.
Functionally, “data” serves as a bridge between two grammatical worlds. It can represent a plural count noun (like marbles or books) or a singular mass noun (like water or information). The choice often depends on whether you are focusing on the individual components of the information or the information as a whole entity. This dual identity is what makes the word a “prestige” marker in academic writing, where plural usage is often expected to signal formal rigor.
Structural Breakdown: Count vs. Mass Nouns
The core of the “data” debate lies in whether the word functions as a count noun or a mass noun. Count nouns are things we can count individually, such as one apple, two apples. Mass nouns, also known as non-count nouns, represent substances or concepts that cannot be easily divided into separate units, such as luggage, furniture, or happiness.
When “data” is treated as a plural count noun, it follows the rules of plural subject-verb agreement. This means using plural verbs like were, are, and have. It also requires plural determiners like these, those, many, or few. This structure is common in mathematics, physics, and traditional social sciences where each individual data point is considered a distinct entity that contributes to a larger set.
Conversely, when “data” is treated as a singular mass noun, it behaves like the word information. It takes singular verbs such as is, was, and has. It is modified by singular determiners like this, that, much, or little. This is the dominant usage in journalism, business, and everyday conversation. In these contexts, “data” is viewed as a bulk substance—a “pool” of information rather than a “pile” of individual facts.
Scientific vs. General Usage Categories
Usage of “data” is frequently divided by the “register” or the level of formality of the communication. In the scientific and technical community, the plural usage remains the gold standard. Many prestigious journals, such as Nature or the British Medical Journal, have historically required “data are” in their style guides. In these fields, precision is paramount, and acknowledging the individual nature of observations is a key part of the scientific method.
In general usage, including news media, marketing, and general fiction, the singular usage has become the norm. The Associated Press (AP) Stylebook and the Wall Street Journal have updated their guidelines to accept “data is” in most contexts, noting that the word is typically thought of as a collective unit. This shift reflects the “democratization” of data; as data becomes a part of daily life for non-scientists, the language adapts to make it easier to use.
There is also a third category: the computing context. In IT and software engineering, “data” is almost exclusively singular. We talk about data processing, data storage, and data integrity. In these instances, data is treated as a digital fluid or a resource, much like oil or electricity. No programmer says, “The data are being transferred to the server,” unless they are being intentionally archaic.
Extensive Examples of Usage
To help you visualize the differences between these two approaches, the following tables provide comprehensive examples of how “data” is used in various sentence structures. The first table focuses on the plural construction often found in academic and scientific writing.
| Count Noun Construction | Example Sentence | Reasoning |
|---|---|---|
| These data | These data show a clear correlation between variables. | Plural determiner ‘these’ matches plural ‘data’. |
| Data are | The data are currently being analyzed by the team. | Plural verb ‘are’ treats data as multiple points. |
| Few data | Few data were available to support the hypothesis. | ‘Few’ is used for plural countable items. |
| Many data | Many data were collected during the three-year study. | ‘Many’ indicates a large number of individual units. |
| Data were | The experimental data were recorded in the log. | Past tense plural agreement. |
| Data have | The data have led us to a new conclusion. | Present perfect plural agreement. |
| Those data | Those data suggest that the previous theory was wrong. | Distal plural determiner. |
| Data suggest | The data suggest a significant increase in temperature. | Plural verb form (no ‘s’). |
| Data indicate | The raw data indicate several outliers. | Plural verb form. |
| Individual data | The individual data were checked for accuracy. | Emphasizes the separate nature of the points. |
| The data themselves | The data themselves are not the problem; the interpretation is. | Plural reflexive pronoun. |
| A few data | A few data points were missing from the set. | Often used with ‘points’ to clarify plurality. |
| Data reveal | The collected data reveal a pattern of behavior. | Plural verb form. |
| Data provide | These data provide evidence of climate change. | Plural verb form. |
| Data demonstrate | The data demonstrate the effectiveness of the drug. | Plural verb form. |
| Data support | The data support the claim made by the author. | Plural verb form. |
| Data highlight | These data highlight the need for more funding. | Plural verb form. |
| Data confirm | The latest data confirm our initial suspicions. | Plural verb form. |
| Data vary | The data vary significantly across different regions. | Plural verb form. |
| Data prove | The data prove that the intervention worked. | Plural verb form. |
The second table illustrates the singular usage, which is common in business, journalism, and everyday speech. This approach treats “data” as a singular mass, similar to “information” or “money.”
| Mass Noun Construction | Example Sentence | Reasoning |
|---|---|---|
| This data | This data is very helpful for our marketing strategy. | Singular determiner ‘this’ treats data as a whole. |
| Data is | The data is stored on a secure cloud server. | Singular verb ‘is’ treats data as a single entity. |
| Little data | There is very little data to support that claim. | ‘Little’ is used for non-count mass nouns. |
| Much data | How much data does the application consume? | ‘Much’ is used for non-count mass nouns. |
| Data was | The data was corrupted during the transfer. | Past tense singular agreement. |
| Data has | The data has shown that customers prefer blue. | Present perfect singular agreement. |
| That data | That data looks suspicious to the auditors. | Distal singular determiner. |
| Data suggests | The data suggests we should pivot our business. | Singular verb form (ends in ‘s’). |
| Data indicates | The historical data indicates a seasonal trend. | Singular verb form. |
| The whole data | The whole data set was reviewed by the manager. | Treats the collection as a single unit. |
| The data itself | The data itself is not enough to make a decision. | Singular reflexive pronoun. |
| An amount of data | A large amount of data was processed overnight. | ‘Amount’ is used for mass nouns. |
| Data reveals | The data reveals a gap in the current market. | Singular verb form. |
| Data provides | The data provides a clear picture of the economy. | Singular verb form. |
| Data demonstrates | The data demonstrates that the plan is failing. | Singular verb form. |
| Data supports | The data supports the CEO’s vision for growth. | Singular verb form. |
| Data highlights | The data highlights a major security flaw. | Singular verb form. |
| Data confirms | The data confirms that we met our sales targets. | Singular verb form. |
| Data varies | The data varies from one department to another. | Singular verb form. |
| Data proves | The data proves the value of our investment. | Singular verb form. |
When you are unsure which to use, it is helpful to compare “data” to other words that follow similar patterns. The following table compares “data” with other nouns that have Latin or Greek plural forms, showing how some have remained plural while others have become singular in common usage.
| Singular Form | Plural Form | Common Modern Usage | Example Sentence |
|---|---|---|---|
| Datum | Data | Usually Singular (Mass) | The data is ready. |
| Criterion | Criteria | Strictly Plural | These criteria are strict. |
| Phenomenon | Phenomena | Strictly Plural | These phenomena are rare. |
| Medium | Media | Usually Plural (but often Singular) | The media are/is influential. |
| Alumnus | Alumni | Strictly Plural | The alumni are meeting today. |
| Bacterium | Bacteria | Usually Plural | Bacteria are growing in the dish. |
| Agendum | Agenda | Singular (Collective) | The agenda is set. |
| Stratum | Strata | Strictly Plural | The rock strata are visible. |
| Curriculum | Curricula | Strictly Plural | The curricula are being updated. |
| Cactus | Cacti | Strictly Plural | The cacti are blooming. |
Comprehensive Usage Rules and Exceptions
Navigating the “data” dilemma requires a set of clear rules that you can apply depending on your writing environment. The most important rule is consistency. Regardless of whether you choose singular or plural, you must stick with that choice throughout your entire document. Mixing “the data are” and “this data is” in the same paragraph is considered a major stylistic error and suggests a lack of attention to detail.
Rule 1: Know Your Audience. If you are writing for a scientific journal (like Science, Nature, or The Lancet), use “data” as a plural noun. If you are writing a blog post, a business email, or a news article, “data” as a singular noun is generally preferred and sounds more natural to the modern ear.
Rule 2: The “Information” Test. If you can replace the word data with information and the sentence still makes sense, you are likely using it as a mass noun. In this case, use singular verbs. For example: “The information is useful” becomes “The data is useful.”
Rule 3: The “Facts” Test. If you can replace data with facts and the sentence sounds correct, you are likely using it as a count noun. In this case, use plural verbs. For example: “The facts are clear” becomes “The data are clear.”
Rule 4: Avoid “Datum” unless necessary. The singular datum is very rare in modern English. If you need to refer to a single piece of information, it is often better to use the phrase “data point” or “piece of data.” Writing “This datum is interesting” can sound overly pedantic or archaic in most contexts.
Rule 5: Use “Amount” vs. “Number” correctly. If you treat data as singular, use “amount of data.” If you treat it as plural, use “number of data” (though “number of data points” is much better). Using “amount of data” with plural verbs is a grammatical mismatch.
Common Mistakes and How to Avoid Them
One of the most frequent errors is the agreement mismatch. This occurs when a writer uses a singular determiner with a plural verb, or vice versa. For example, “These data is important” or “This data are incorrect.” Always ensure that the determiner (this/these), the noun (data), and the verb (is/are) all agree in number.
Another common mistake is over-correction. Some writers, aware that “data” is technically plural, try to use it that way in informal settings where it sounds awkward. If you are writing a casual text message, saying “The data are in!” might make you sound like a robot. It is important to match your grammar to the social context of your communication.
The table below highlights common incorrect usages and provides the corrected versions for both formal and informal styles.
| Incorrect Usage | Correct (Formal/Plural) | Correct (Informal/Singular) |
|---|---|---|
| This data are wrong. | These data are wrong. | This data is wrong. |
| Much data were lost. | Many data were lost. | Much data was lost. |
| Data is shown in these table. | Data are shown in these tables. | Data is shown in this table. |
| A data was found. | A data point was found. | A piece of data was found. |
| The data itself are clear. | The data themselves are clear. | The data itself is clear. |
| How many data is there? | How many data are there? | How much data is there? |
| Those data has value. | Those data have value. | That data has value. |
| The data suggests things. | The data suggest things. | The data suggests things. |
Practice Exercises with Answer Key
Testing your knowledge is the best way to internalize these rules. The following exercises are designed to help you recognize and apply the correct forms of “data” in various contexts. Pay close attention to the surrounding words, as they often provide clues about whether the singular or plural form is required.
Exercise 1: Subject-Verb Agreement
Choose the correct verb form (is/are) or (has/have) to complete the following sentences based on the context provided.
- In this scientific report, the data (is/are) presented in Figure 1.
- My computer’s data (has/have) been backed up to the external drive.
- These data (suggest/suggests) that the experiment was a success.
- How much data (is/are) required to run this simulation?
- The raw data (were/was) collected by the graduate students last summer.
- This data (looks/look) much more promising than the last set.
- Many data (was/were) excluded due to technical errors.
- The data (itself/themselves) are not enough to prove the theory.
- The census data (shows/show) a decline in the local population.
- The data (has/have) finally arrived from the laboratory.
Exercise 2: Determiner Selection
Choose the correct determiner (this/these), (much/many), or (little/few) to complete the sentences.
- (This/These) data are essential for our peer-reviewed publication.
- We don’t have (much/many) data on the long-term effects of the drug.
- (That/Those) data were gathered under strict laboratory conditions.
- There were very (little/few) data available during the early stages of the study.
- (This/These) data is exactly what the marketing team requested.
- How (much/many) data points did you include in the final graph?
- (This/These) data set is the largest we have ever analyzed.
- (Much/Many) data have been written about this specific phenomenon.
- The researcher analyzed (this/these) data with great care.
- (Little/Few) data was recovered from the damaged hard drive.
Answer Key
| Question # | Exercise 1 Answers | Exercise 2 Answers |
|---|---|---|
| 1 | are (Formal context) | These (Plural agreement) |
| 2 | has (Computing context) | much (Mass noun usage) |
| 3 | suggest (Plural agreement) | Those (Plural agreement) |
| 4 | is (Mass noun usage) | few (Plural agreement) |
| 5 | were (Formal context) | This (Singular agreement) |
| 6 | looks (Singular agreement) | many (Countable points) |
| 7 | were (Plural agreement) | This (Singular agreement) |
| 8 | themselves (Plural agreement) | Many (Plural agreement) |
| 9 | shows (General usage) | this (Singular context) |
| 10 | have (Formal context) | Little (Singular context) |
Advanced Topics: The Evolution of Language
The debate over “data” is a classic example of linguistic drift. This occurs when the common usage of a word moves away from its historical or etymological roots. In English, many words that were originally plural have become singular over time. For instance, the word agenda was once the plural of agendum, but today, no one says “The agenda are ready.” Similarly, candies and pea (originally pease) have undergone morphological changes.
Linguists often distinguish between prescriptive grammar and descriptive grammar. Prescriptive grammar tells you how you should speak based on established rules (e.g., “Data are plural because it is Latin”). Descriptive grammar describes how people actually speak (e.g., “Most people use data as a singular noun, so it is functionally singular”). The “data” debate is a battleground between these two philosophies. While prescriptivists hold the line in academia, descriptivists have largely won the battle in popular culture.
Another advanced concept is the collective noun. Collective nouns represent a group of individuals but usually take a singular verb in American English (e.g., “The team is winning”). In British English, collective nouns often take plural verbs (e.g., “The team are winning”). Interestingly, the “data” debate doesn’t follow this geographic split as cleanly; both American and British scientists tend to prefer the plural “data are,” while both American and British journalists are moving toward the singular “data is.”
The rise of “Big Data” as a concept has further solidified the singular usage. When we talk about Big Data, we aren’t talking about a collection of individual numbers; we are talking about a massive, unquantifiable technological force. You would never say “Big Data are changing the world.” This demonstrates how new cultural and technological concepts can finalize the grammatical status of a word.
Frequently Asked Questions (FAQ)
1. Is it ever wrong to use “data is”?
In most professional and casual settings, “data is” is perfectly acceptable. However, in strictly academic, scientific, or medical writing, “data is” may be flagged as an error by editors or professors who adhere to traditional Latin-based rules.
2. What is the singular of data?
The technical singular is datum. However, in modern English, people rarely use datum. Instead, they use phrases like “a piece of data,” “a data point,” or “a single observation” to refer to one unit of information.
3. Why do some people get angry about this?
Language is often tied to identity and education. For some, using “data are” is a way to signal that they are highly educated or respect the history of the English language. For others, insisting on “data are” feels like unnecessary pedantry that ignores how people actually communicate.
4. Does the meaning change if I use the plural vs. the singular?
The core meaning remains the same, but the emphasis changes. “The data are” emphasizes the individual components and the variety within the set. “The data is” emphasizes the total sum of information as a single resource.
5. What do style guides like APA and MLA say?
The APA (American Psychological Association) style traditionally prefers “data are.” The MLA (Modern Language Association) is more flexible but generally leans toward plural in formal research. Always check the specific style guide required by your institution or employer.
6. Can I use “datas” as a plural?
No, “datas” is not a word in standard English. Whether you treat “data” as singular or plural, the word itself does not take an “s” at the end. The only exception might be in very specific computer science jargon (like “datasheets”), but “datas” as a standalone plural is incorrect.
7. Is this the same as “media” and “medium”?
Yes, it is a very similar situation. Media is the plural of medium. While we still use medium (e.g., “the medium of oil paint”), we often use media as a singular collective noun (e.g., “The media is obsessed with this story”).
8. How should I use “data” in a job interview?
In a professional setting, the singular “data is” is usually safer and sounds more modern. However, if you are interviewing for a role in high-level statistics, research, or academia, using the plural “data are” can demonstrate your familiarity with the conventions of those fields.
Conclusion and Key Takeaways
Understanding whether “data” is singular or plural is less about memorizing a single “right” answer and more about understanding the context of your writing. While its Latin roots dictate a plural treatment, modern English has largely embraced its role as a singular mass noun. The most important takeaways are to know your audience, use the “information” and “facts” tests to guide your verb choices, and—above all—maintain consistency within your document. Whether you choose data is or data are, your goal should always be clarity and precision. By paying attention to these subtle grammatical cues, you can ensure that your data—whether treated as a collection of points or a single body of evidence—effectively supports your message.
