{"id":2949,"date":"2024-02-16T14:13:00","date_gmt":"2024-02-16T14:13:00","guid":{"rendered":"https:\/\/blog.wordvice.com\/?p=2949"},"modified":"2025-04-02T07:56:16","modified_gmt":"2025-04-02T07:56:16","slug":"title-capitalization-rules-for-research-papers","status":"publish","type":"post","link":"https:\/\/wordvice.com\/blog\/title-capitalization-rules-for-research-papers\/","title":{"rendered":"What to Capitalize in a Title: APA Title Capitalization Rules"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\"><strong>Which words do you capitalize in a title?<\/strong><\/h2>\n\n\n\n<p>Have you ever been confused about which words to capitalize in the <a href=\"https:\/\/wordvice.com\/blog\/best-title-for-journal-manuscript\/\">title of your manuscript<\/a>? You have probably seen titles where only the first word is capitalized (so-called \u201csentence case\u201d), titles where all words seem to be capitalized (\u201ctitle case\u201d), and also titles that look like combinations of the two. And you might have wondered where there is any general rule to all this.&nbsp;<\/p>\n\n\n\n<p>The answer is that, no, there is not really <em>one<\/em> general capitalization rule, but there are several style-dependent capitalization guidelines you can rely on, and the journal you plan to submit to will tell you (in their <a href=\"https:\/\/wordvice.com\/blog\/manuscript-format-journal-author-instructions\/\">author instructions<\/a>) which one they want you to apply to your manuscript before submission. Just like you format your manuscript and reference list following APA or MLA formatting rules, you apply the respective style guide to capitalize your title, <a href=\"https:\/\/wordvice.com\/blog\/formatting-research-paper-headings-and-subheadings\/\">headings, and subheadings<\/a>. In this article, we will first explain the general rules on what types of words to capitalize (e.g., nouns, articles, and conjunctions) and then look at the APA and MLA style guides in particular and their specific variations of those rules.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"686\" src=\"https:\/\/ee-blog-cdn.wordvice.com\/us\/wp-content\/uploads\/2022\/05\/09000944\/pexels-enzo-abramo-1298626-1024x686.jpg\" alt=\"is can capitalized in a title, keyboard closeup\" class=\"wp-image-2952\" style=\"width:758px;height:507px\" srcset=\"https:\/\/ee-blog-cdn.wordvice.com\/us\/wp-content\/uploads\/2022\/05\/09000944\/pexels-enzo-abramo-1298626-1024x686.jpg 1024w, https:\/\/ee-blog-cdn.wordvice.com\/us\/wp-content\/uploads\/2022\/05\/09000944\/pexels-enzo-abramo-1298626-300x201.jpg 300w, https:\/\/ee-blog-cdn.wordvice.com\/us\/wp-content\/uploads\/2022\/05\/09000944\/pexels-enzo-abramo-1298626-768x514.jpg 768w, https:\/\/ee-blog-cdn.wordvice.com\/us\/wp-content\/uploads\/2022\/05\/09000944\/pexels-enzo-abramo-1298626.jpg 1280w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">Knowing which words to capitalize in a title is important in setting the quality of language for the rest of your paper.<\/figcaption><\/figure><\/div>\n\n\n<h2 class=\"wp-block-heading\"><strong>Research Paper Title Capitalization Rules<\/strong><\/h2>\n\n\n\n<p>According to most style guides, all proper nouns, pronouns, verbs, adjectives, and adverbs in titles of books and articles are to be capitalized. Some elements of titles are, however, never capitalized, such as articles (except articles at the beginning of a title), and some, such as conjunctions, can or cannot be capitalized, depending on the specific style guide variation. In the following, we will outline the general rules for all the different words in your title so that you can orient yourself easily to the different style guides and adapt your title quickly when necessary.&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Capitalizing Nouns and Pronouns&nbsp;in Titles<\/strong><\/h2>\n\n\n\n<p><a href=\"https:\/\/wordvice.com\/blog\/topic\/language-rules\/nouns\/\">Nouns<\/a> (including formal names of people, organizations, and places) and <a href=\"https:\/\/wordvice.com\/blog\/topic\/language-rules\/pronouns\/\">pronouns<\/a> are easy to format, as all style guides agree that they should always be capitalized using title case capitalization.&nbsp;<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td><strong>Incorrect<\/strong><\/td><td><strong>Correct<\/strong><\/td><\/tr><tr><td>Harry Potter and the <span class=\"has-inline-color has-vivid-red-color\">chamber<\/span> of secrets<\/td><td>Harry Potter and the <span class=\"has-inline-color has-vivid-green-cyan-color\">Chamber <\/span>of Secrets<\/td><\/tr><tr><td>For <span class=\"has-inline-color has-vivid-red-color\">whom<\/span> the<span class=\"has-inline-color has-vivid-red-color\"> bell<\/span> Tolls<\/td><td>For <span class=\"has-inline-color has-vivid-green-cyan-color\">Whom<\/span> the <span class=\"has-inline-color has-vivid-green-cyan-color\">Bell <\/span>Tolls<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Capitalizing Articles in Titles<\/strong><\/h2>\n\n\n\n<p>The rules for <a href=\"https:\/\/wordvice.com\/blog\/how-to-correctly-use-articles-a-an-the-in-your-writing\/\">articles <\/a>are also simple, as all major style guides agree that articles should be lowercase in titles\u2014unless they represent the first and\/or last word in the title:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td><strong>Incorrect<\/strong><\/td><td><strong>Correct<\/strong><\/td><\/tr><tr><td>Harry Potter and<span class=\"has-inline-color has-vivid-red-color\"> The <\/span>Chamber of Secrets<\/td><td>Harry Potter and <span class=\"has-inline-color has-vivid-green-cyan-color\">the <\/span>Chamber of Secrets&nbsp;<\/td><\/tr><tr><td><span class=\"has-inline-color has-vivid-red-color\">the<\/span> Lord of the Rings&nbsp;<\/td><td><span class=\"has-inline-color has-vivid-green-cyan-color\">The<\/span> Lord of the Rings&nbsp;<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>In the latter example, the first \u201cthe\u201d is capitalized because it is the first word of the title, while the second \u201cthe\u201d is lowercase as articles usually are. Note that the same rule regarding article capitalization applies to subtitles as well.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td><strong>Incorrect<\/strong><\/td><td><strong>Correct<\/strong><\/td><\/tr><tr><td>The Development of the European Union: <span class=\"has-inline-color has-vivid-red-color\">a<\/span> History of Integration&nbsp;<\/td><td>The Development of the European Union: <span class=\"has-inline-color has-vivid-green-cyan-color\">A<\/span> History of Integration<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Capitalizing Conjunctions in Titles<\/strong><\/h2>\n\n\n\n<p><a href=\"https:\/\/wordvice.com\/blog\/topic\/language-rules\/conjunctions\/\">Conjunctions<\/a> are a slightly more complicated case, as style guides differ on whether to capitalize them or on which conjunctions to capitalize. According to some guides,&nbsp; conjunctions of three letters or fewer are to be written in lowercase while longer ones should be capitalized. Other style guides, however, state to write all conjunctions in lowercase, or make exceptions for specific conjunctions such as \u201cyet\u201d, \u201cso\u201d, and \u201cas\u201d. It is therefore always necessary to look up the specific rules of the target journal before submitting a manuscript\u2014and have a look at our sections on APA and MLA style below. The following examples are, however, fairly universal:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td><strong>Incorrect<\/strong><\/td><td><strong>Correct<\/strong><\/td><\/tr><tr><td>The Lord <span class=\"has-inline-color has-vivid-red-color\">Of<\/span> the Rings<\/td><td>The Lord <span class=\"has-inline-color has-vivid-green-cyan-color\">of <\/span>the Rings<\/td><\/tr><tr><td>Harry Potter<span class=\"has-inline-color has-vivid-red-color\"> And<\/span> The Chamber of Secrets<\/td><td>Harry Potter <span class=\"has-inline-color has-vivid-green-cyan-color\">and <\/span>The Chamber of Secrets<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Capitalizing Prepositions in Titles<\/strong><\/h2>\n\n\n\n<p>Capitalization rules for <a href=\"https:\/\/wordvice.com\/blog\/topic\/language-rules\/prepositions\/\">prepositions<\/a> are equally ambiguous and depend on the specific style guide you follow. Prepositions of four letters or more are often capitalized, while according to some style guides, all prepositions are written in lowercase, no matter their length. Sometimes, for example, when following the <a href=\"https:\/\/wordvice.com\/citation-guide\/chicago\">Chicago Manual of Style<\/a>, capitalization depends on how a preposition is used in a title and whether it does indeed function as a preposition. According to this rule, prepositions are capitalized when they are used &#8220;adverbially or adjectivally&#8221; in prepositional phrases (as in &#8220;How to Back Up a Computer&#8221;), but not when used otherwise.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Capitalizing Adjectives and Adverbs in Titles&nbsp; &nbsp; &nbsp; <\/strong><\/h2>\n\n\n\n<p>Rules for capitalizing<a href=\"https:\/\/wordvice.com\/blog\/topic\/language-rules\/adjectives\/\"> adjectives<\/a> and <a href=\"https:\/\/wordvice.com\/blog\/topic\/language-rules\/adverbs\/\">adverbs<\/a>, like nouns, are unproblematic, as they are capitalized across style guides.&nbsp;<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td><strong>Incorrect<\/strong><\/td><td><strong>Correct<\/strong><\/td><\/tr><tr><td>Stephen King wrote The <span class=\"has-inline-color has-vivid-red-color\">long<\/span> Walk in 1979.<\/td><td>Stephen King wrote The <span class=\"has-inline-color has-vivid-green-cyan-color\">Long<\/span> Walk in 1979.<\/td><\/tr><tr><td>The Art of Thinking <span class=\"has-inline-color has-vivid-red-color\">clearly<\/span>, by Swiss writer Rolf Dobelli, describes the most common thinking errors, ranging from cognitive biases to social distortions.<\/td><td>The Art of Thinking <span class=\"has-inline-color has-vivid-green-cyan-color\">Clearly<\/span>, by Swiss writer Rolf Dobelli, describes the most common thinking errors, ranging from cognitive biases to social distortions.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Capitalizing Verbs in Titles&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<\/strong><\/h2>\n\n\n\n<p><a href=\"https:\/\/wordvice.com\/blog\/topic\/language-rules\/verb-tenses\/\">Verbs<\/a> are another easy case and are also always capitalized, according to all style guides.&nbsp;<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td><strong>Incorrect<\/strong><\/td><td><strong>Correct<\/strong><\/td><\/tr><tr><td>The World as I <span class=\"has-inline-color has-vivid-red-color\">see<\/span> It is a book by Albert Einstein.<\/td><td>The World as I <span class=\"has-inline-color has-vivid-green-cyan-color\">See<\/span> It is a book by Albert Einstein.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Title Case Rules by Style Guide<\/strong><strong> <\/strong><strong><\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>APA Title Case Rules&nbsp;&nbsp;&nbsp;<\/strong><\/h3>\n\n\n\n<p><a href=\"https:\/\/apastyle.apa.org\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">APA (American Psychological Association) style<\/a> is most commonly used for scholarly articles in the behavioral and social sciences. The APA guidelines on when to capitalize a title include the following rules:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td><strong>Capitalize<\/strong><\/td><td>&#8211; the first word of the title or heading (or any subtitle\/subheading)<br>&#8211; all nouns, verbs, adjectives, adverbs, and pronouns\u2014note that this includes the second part of hyphenated words (e.g., Self-Reliance not Self-reliance)<br>&#8211; all other words of four letters or more<\/td><\/tr><tr><td><strong>Do NOT Capitalize<\/strong><\/td><td>&#8211; the second word after a hyphenated prefix in compound modifiers (e.g., Mid-morning, Anti-inflammatory, etc.).<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>MLA Title Case Rules&nbsp;&nbsp;<\/strong><\/h3>\n\n\n\n<p>The <a href=\"https:\/\/style.mla.org\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">Modern Language Association (MLA) Handbook<\/a>, used primarily to write papers and cite sources within the liberal arts and humanities, promotes the following rules for when to capitalize a title or header:<\/p>\n\n\n\n<p><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td><strong>Capitalize<\/strong><\/td><td>&#8211; the first word of the title or heading (and of any subtitle\/subheading)<br>&#8211; all nouns, verbs, adjectives, adverbs, and pronouns (here as well, including the second part of hyphenated major words <\/td><\/tr><tr><td><strong>Do NOT Capitalize<\/strong><\/td><td>&#8211; articles and prepositions (regardless of length)<br>&#8211; coordinating conjunctions (for, and, nor, but, or, yet, so)<br>&#8211; the second word after a hyphenated prefix in compound modifiers<br>&#8211; the \u201cto\u201d in infinitives (e.g., \u201cHow to Achieve Global Prosperity\u201d) <\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Additional Rules for Title Capitalization&nbsp; <\/strong><strong><\/strong><\/h2>\n\n\n\n<p>As we have stressed several times throughout this article, it is crucial to always check the specific rules of the target journal and\/or the rules of the style guide the target journal wants you to follow\u2014note that these can sometimes conflict with each other, in which case the journal rules override the style guide. Apart from the two common style guides we explained here, <a href=\"https:\/\/apastyle.apa.org\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">APA<\/a> and <a href=\"https:\/\/style.mla.org\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">MLA<\/a>, there are several others that have their own rules, such as the <a href=\"https:\/\/www.chicagomanualofstyle.org\/home.html\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">Chicago Manual of Style<\/a>, the <a href=\"https:\/\/www.amamanualofstyle.com\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">American Medical Association (AMA) Manual of Style<\/a>, or the <a href=\"https:\/\/www.apstylebook.com\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">Associated Press Stylebook<\/a>, an American English grammar style and usage guide originally developed for AP writers but now used widely across journalistic fields. There is even a specific set of rules for the <a href=\"https:\/\/en.wikipedia.org\/wiki\/Wikipedia:Manual_of_Style\/Titles\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">capitalization of titles of Wikipedia articles<\/a>!<\/p>\n\n\n\n<p>One capitalization rule that might not necessarily be mentioned in such style guides but is relevant for some academic\/scientific fields is that when the Latin name of a species is mentioned, the second portion of the name must be written in lowercase, even when the rest of the title follows title case rules.<\/p>\n\n\n\n<p>Another capitalization rule you might need when describing research experiments is that both elements of spelled-out numbers or simple fractions should be capitalized in title case:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td><strong>Incorrect<\/strong><\/td><td><strong>Correct<\/strong><\/td><\/tr><tr><td>The Beck Depression Inventory: Twenty-<span class=\"has-inline-color has-vivid-red-color\">five <\/span>Years of Evaluation <\/td><td>The Beck Depression Inventory: Twenty-<span class=\"has-inline-color has-vivid-green-cyan-color\">Five<\/span> Years of Evaluation <\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>Lastly, no matter your personal preference, make sure you always write the titles of books and articles exactly as they are written on the original document\/in the original version, even if they do not seem to follow common capitalization rules.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Correct Capitalization in Your Title with Professional Editing<\/strong><strong>&nbsp;&nbsp;&nbsp;<\/strong><\/h2>\n\n\n\n<p>Use a <a href=\"https:\/\/wordvice.ai\/tools\/grammar-checker\" target=\"_blank\" rel=\"noreferrer noopener\">free grammar checker<\/a> to give your work a quick check. If you are even more unsure now how to capitalize your title or find the author instructions of your target journal confusing (which can happen, since those sets of rules have often grown organically over a long period of time and, as a result, can lack consistency), then you might want to make use of professional <a href=\"https:\/\/wordvice.com\">English proofreading services<\/a>, including <a href=\"https:\/\/wordvice.com\/services\/academic-editing\">paper editing services<\/a>\u2014your professional academic editor will figure such details out for you and make sure your manuscript is in the correct format before submission.<\/p>\n\n\n\n<p>If you need more input on how to write and perfect the other parts of your manuscript, then head over to the <a href=\"https:\/\/wordvice.com\/blog\/academy-academic\/\">Wordvice academic resources <\/a>website where we have many more resources for you.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Wordvice Citation Tools<\/strong><\/h2>\n\n\n\n<p><strong><a href=\"https:\/\/wordvice.com\/apa-citation-generator\">APA Citation Generator<\/a><\/strong><br><strong><a href=\"https:\/\/wordvice.com\/mla-citation-generator\">MLA Citation Generator<\/a><\/strong><br><strong><a href=\"https:\/\/wordvice.com\/chicago-citation-generator\">Chicago Citation Generator<\/a><\/strong><br><a href=\"https:\/\/wordvice.com\/vancouver-citation-generator\"><strong>Vancouver Citation Generator<\/strong><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Which words do you capitalize in a title? Have you ever been confused about which words to capitalize in the title of your manuscript? You have probably seen titles where only the first word is capitalized (so-called \u201csentence case\u201d), titles where all words seem to be capitalized (\u201ctitle case\u201d), and also titles that look like [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":2953,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7,25],"tags":[17,18,52,39],"class_list":["post-2949","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-academic","category-style-and-formatting","tag-academic-writing-tips","tag-manuscript-writing","tag-research-paper","tag-research-writing"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>What to Capitalize in a Title: APA Title Capitalization Rules - Wordvice<\/title>\n<meta name=\"description\" content=\"Learn what to capitalize in a research paper title. 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