{"id":2695,"date":"2021-11-16T11:51:54","date_gmt":"2021-11-16T11:51:54","guid":{"rendered":"https:\/\/www.psyctc.org\/psyctc\/?post_type=docs&#038;p=2695"},"modified":"2021-11-16T11:51:54","modified_gmt":"2021-11-16T11:51:54","password":"","slug":"scatterplot-scattergram","status":"publish","type":"docs","link":"https:\/\/www.psyctc.org\/psyctc\/glossary2\/scatterplot-scattergram\/","title":{"rendered":"Scatterplot\/scattergram"},"content":{"rendered":"\n<p>We put the scatterplot as one of the five vital plotting procedures for therapy outcome\/change data.  (With the Jacobson plot as a specialised scatterplot and cat&#8217;s cradle plots, histograms, boxplots and forest plots as the other four.)<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Details<\/h4>\n\n\n\n<p>For our purposes a scatterplot shows the relationship between two variables where they have been measured at the same time in the same person.  Here&#8217;s an example.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/www.psyctc.org\/psyctc\/wp-content\/uploads\/2021\/11\/scatterpoint-1024x1024.png\" alt=\"\" class=\"wp-image-2696\" srcset=\"https:\/\/www.psyctc.org\/psyctc\/wp-content\/uploads\/2021\/11\/scatterpoint-1024x1024.png 1024w, https:\/\/www.psyctc.org\/psyctc\/wp-content\/uploads\/2021\/11\/scatterpoint-300x300.png 300w, https:\/\/www.psyctc.org\/psyctc\/wp-content\/uploads\/2021\/11\/scatterpoint-150x150.png 150w, https:\/\/www.psyctc.org\/psyctc\/wp-content\/uploads\/2021\/11\/scatterpoint-768x768.png 768w, https:\/\/www.psyctc.org\/psyctc\/wp-content\/uploads\/2021\/11\/scatterpoint-1536x1536.png 1536w, https:\/\/www.psyctc.org\/psyctc\/wp-content\/uploads\/2021\/11\/scatterpoint.png 1700w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>Those are 88 scores on the CORE-OM risk scale on the y axis and the non-risk score, i.e. the mean of the other 28 on-risk items, on the x axis.  (The data are real from a non-help-seeking sample of young adults in Quito, Ecuador.)  The line of points on the x axis, i.e. with y = 0, show us that a lot of the sample have answered &#8220;Not at all&#8221; to all six risk items but we can also see that there is a tendency for the risk scores to rise as the non-risk score rises (that takes us to correlation, regression and linear regression, I&#8217;ll use the same data to illustrate those entries).  One nice thing about scatterplots is that you can use colour to separate points by a third variable.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/www.psyctc.org\/psyctc\/wp-content\/uploads\/2021\/11\/scatterpointGender-1024x1024.png\" alt=\"\" class=\"wp-image-2697\" srcset=\"https:\/\/www.psyctc.org\/psyctc\/wp-content\/uploads\/2021\/11\/scatterpointGender-1024x1024.png 1024w, https:\/\/www.psyctc.org\/psyctc\/wp-content\/uploads\/2021\/11\/scatterpointGender-300x300.png 300w, https:\/\/www.psyctc.org\/psyctc\/wp-content\/uploads\/2021\/11\/scatterpointGender-150x150.png 150w, https:\/\/www.psyctc.org\/psyctc\/wp-content\/uploads\/2021\/11\/scatterpointGender-768x768.png 768w, https:\/\/www.psyctc.org\/psyctc\/wp-content\/uploads\/2021\/11\/scatterpointGender-1536x1536.png 1536w, https:\/\/www.psyctc.org\/psyctc\/wp-content\/uploads\/2021\/11\/scatterpointGender.png 1700w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>With a fairly small number of observations\/values the scatterplot is pretty self-explanatory, things get a bit more complicated with larger datasets because of &#8220;overprinting&#8221;.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Try also<\/h4>\n\n\n\n<p>Overprinting<br>Jittering<br>Jacobson plot<br>Cat&#8217;s cradle plots<br><a href=\"https:\/\/www.psyctc.org\/psyctc\/glossary2\/histograms-and-barplots\/\" data-type=\"docs\" data-id=\"2414\">Histograms<\/a><br><a href=\"https:\/\/www.psyctc.org\/psyctc\/glossary2\/boxplot-or-box-plot\/\" data-type=\"docs\" data-id=\"2469\">Boxplots<\/a><br>Forest plots <\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Chapters<\/h4>\n\n\n\n<p>Introduced in Chapter 5 and used in Chapters 6 and 7.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Dates<\/h4>\n\n\n\n<p>Created 16\/11\/21.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>We put the scatterplot as one of the five vital plotting procedures for therapy outcome\/change data. (With the Jacobson plot as a specialised scatterplot and cat&#8217;s cradle plots, histograms, boxplots and forest plots as the other four.) Details For our purposes a scatterplot shows the relationship between two variables where they have been measured at &hellip; <a href=\"https:\/\/www.psyctc.org\/psyctc\/glossary2\/scatterplot-scattergram\/\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">Scatterplot\/scattergram<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","template":"","meta":{"footnotes":""},"doc_category":[18],"glossaries":[],"doc_tag":[],"knowledge_base":[],"class_list":["post-2695","docs","type-docs","status-publish","hentry","doc_category-om-book"],"year_month":"2026-04","word_count":239,"total_views":"1599","reactions":{"happy":"0","normal":"0","sad":"0"},"author_info":{"name":"chris","author_nicename":"chris","author_url":"https:\/\/www.psyctc.org\/psyctc\/author\/chris\/"},"doc_category_info":[{"term_name":"All OM book glossary entries","term_url":"https:\/\/www.psyctc.org\/psyctc\/glossary\/non-knowledgebase\/om-book\/"}],"doc_tag_info":[],"knowledge_base_info":[],"knowledge_base_slug":[],"_links":{"self":[{"href":"https:\/\/www.psyctc.org\/psyctc\/wp-json\/wp\/v2\/docs\/2695","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.psyctc.org\/psyctc\/wp-json\/wp\/v2\/docs"}],"about":[{"href":"https:\/\/www.psyctc.org\/psyctc\/wp-json\/wp\/v2\/types\/docs"}],"author":[{"embeddable":true,"href":"https:\/\/www.psyctc.org\/psyctc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.psyctc.org\/psyctc\/wp-json\/wp\/v2\/comments?post=2695"}],"version-history":[{"count":1,"href":"https:\/\/www.psyctc.org\/psyctc\/wp-json\/wp\/v2\/docs\/2695\/revisions"}],"predecessor-version":[{"id":2698,"href":"https:\/\/www.psyctc.org\/psyctc\/wp-json\/wp\/v2\/docs\/2695\/revisions\/2698"}],"wp:attachment":[{"href":"https:\/\/www.psyctc.org\/psyctc\/wp-json\/wp\/v2\/media?parent=2695"}],"wp:term":[{"taxonomy":"doc_category","embeddable":true,"href":"https:\/\/www.psyctc.org\/psyctc\/wp-json\/wp\/v2\/doc_category?post=2695"},{"taxonomy":"glossaries","embeddable":true,"href":"https:\/\/www.psyctc.org\/psyctc\/wp-json\/wp\/v2\/glossaries?post=2695"},{"taxonomy":"doc_tag","embeddable":true,"href":"https:\/\/www.psyctc.org\/psyctc\/wp-json\/wp\/v2\/doc_tag?post=2695"},{"taxonomy":"knowledge_base","embeddable":true,"href":"https:\/\/www.psyctc.org\/psyctc\/wp-json\/wp\/v2\/knowledge_base?post=2695"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}