AP European History Developments and Processes is the first historical thinking skill in the course, and it asks you to identify and explain historical concepts, developments, and processes from roughly 1450 to the present. In plain terms, you name what happened (a movement, trend, idea, or change) and then explain what it was, how it worked, and how it unfolded over time.

This skill runs through everything else you do in the course. Before you can analyze a source, compare two events, or build an argument, you have to correctly identify the historical development at play and explain it accurately. Skill 1 shows up on both multiple-choice questions and free-response questions, so it is worth getting comfortable with early.

What Developments and Processes Means

A few quick definitions help here:

A concept is a broad idea or category, like absolutism, mercantilism, or nationalism.
A development is a specific historical change or event, like the Protestant Reformation or the unification of Germany.
A process is a longer unfolding of related changes over time, like industrialization spreading across Europe or the growth of a money economy.

Skill 1 is not about memorizing dates for their own sake. It is about recognizing what kind of historical change you are looking at and being able to describe it clearly and accurately.

What This Skill Requires

To use Skill 1 well, you need to do two things:

Identify the development or process. This means correctly naming or recognizing it, often from a description, a passage, or a data set.
Explain the development or process. This means describing what it was, how it functioned, what caused it, or what resulted from it, using specific and accurate detail.

Identifying is the recognition step. Explaining is the elaboration step where you show you actually understand the change, not just its label.

Subskills You Need

The CED breaks Skill 1 into two parts. Both appear on the multiple-choice and free-response sections.

1.A: Identify a historical concept, development, or process

This is recognition. You spot the relevant historical development from a prompt, source, or chart.

On MCQ, this often looks like "The passage best reflects which of the following developments?"
On FRQ, this shows up when a prompt asks you to name or point to a specific change.

Example: A 1516 sermon criticizing the sale of indulgences best reflects the questioning of established Catholic Church doctrine in the early sixteenth century.

1.B: Explain a historical concept, development, or process

This is elaboration. You go beyond naming the development and explain how or why it happened, or what it produced.

On MCQ, this often looks like "The trends shown were most directly the result of which of the following?"
On FRQ, this is where you write a sentence or two that develops the idea with accurate reasoning.

Example: Rising wages and prices in sixteenth-century Antwerp were most directly the result of the development and growth of the money economy.

How It Shows Up on the AP Exam

Skill 1 appears across the whole exam.

Multiple-choice questions (55 questions, Section I Part A): Many items ask you to identify a development reflected in a passage or chart, or to explain its most direct cause or result.
Short-answer questions (3 questions, Section I Part B): You often have to identify and briefly explain a development tied to a source or prompt.
Document-based question and long essay (Section II): Identifying and explaining developments accurately is the foundation for evidence and argument. If you misidentify the development, the rest of your analysis drifts off track.

Practical tip: when a question gives a source, read the attribution line (author, role, date) before you decide which development it reflects. The 1516 date and the topic of indulgences point you straight to the early Reformation context.

Examples Across the Course

These show how Skill 1 looks in different units, time periods, and types of evidence.

Course area	Development or process	Identify (1.A)	Explain (1.B)
Age of Reformation	Questioning Catholic doctrine	Name it from a 1516 sermon on indulgences	Explain that this contributed to religious violence and the end of Catholic authority over much of Europe
Economic developments (16th century)	Growth of the money economy	Recognize it from a wage-and-price table for Antwerp	Explain why expanding money supply drove price and wage trends
Absolutism and state power	Prussia's rise without overseas colonies	Identify the reference to Prussia in a 1789 letter	Explain how Prussian success in conflicts like the Seven Years' War showed a state could thrive without colonies
Industrialization	The spread of industry across Europe	Name industrialization as a process beginning in Britain	Explain how mechanized textiles, iron and steel, and state sponsorship spread it to the continent
19th-century politics	Nationalism and unification	Identify nationalism as the development behind Italian and German unification	Explain how unification transformed the European balance of power

Notice the variety: a primary-source sermon, a data table, a government letter, a long economic process, and a political movement. Skill 1 works the same way across all of them.

How to Practice Developments and Processes

Separate the two steps. First write down the development by name. Then write a separate sentence explaining how or why it happened. This keeps 1.A and 1.B distinct in your head.
Use the attribution and date. On source-based questions, the date and author role usually point you to the right development before you even read the full passage.
Read charts for the trend first. With a data table, describe the pattern (wages versus prices, for example) before you connect it to a cause.
Practice cause-and-result phrasing. Many 1.B questions ask for the "most direct" cause or result. Train yourself to pick the closest connection, not just any related event.
Build a development list per unit. For each course area, jot two or three key developments and a one-line explanation of each. This makes recall faster on the exam.

Common Mistakes

Stopping at identification. Naming a development is only half the skill. If the question or rubric wants explanation, a label alone will not earn it.
Picking a true but indirect answer. On "most directly the result of" questions, several options may be historically real but only one is the closest cause. The Antwerp wage-price trends, for example, tie most directly to the money economy, not to the plague or New World crops.
Misreading the time period. A 1516 sermon predates organized Protestantism, so the right development is the questioning of doctrine, not the rejection of Protestant ideas. Watch the date.
Overgeneralizing. Saying "things changed in Europe" is too vague. Name the specific concept, development, or process.
Confusing a development with its context. Skill 1 is about the change itself. Setting the scene around it is a different skill.

Quick Review

Skill 1 has two parts: 1.A identify and 1.B explain a historical concept, development, or process.
A concept is a broad idea, a development is a specific change, and a process unfolds over time.
Identification is recognition. Explanation adds how, why, cause, or result with accurate detail.
It appears on MCQ, short-answer, the DBQ, and the long essay, and it underpins every other skill.
Use dates and source attributions to pin down the right development, and choose the most direct cause or result.
Practice by naming a development and then writing a separate sentence that explains it.