Why Vozelu asks you to type the answer
You see desarrollo beside four English translations and choose “development”. Later, you want to talk about a country’s development and cannot find the Spanish word. The first answer was correct. It was not a test of the task you are struggling with now.
In Vozelu you produce Spanish before you see the answer. We want to see from your practice whether you can retrieve the word, including its spelling, when the answer is not already on the screen.
What the options change
In a choice question you get possible answers. You can use what you know to recognise the right one or rule out the others. In a typed exercise, you must supply the answer yourself. You still have the prompt: from an English meaning or a sentence you know what you are trying to express.
For example, for “the Spanish word for development” the answer is desarrollo. In a later sentence the answer might be the same word, in El ___ económico del país ha sido impresionante. With the sentence you have another task: understanding how the word fits with the surrounding Spanish.
Both exercises involve recall. A sentence is useful when from its context you learn how a word is used. For someone coming across the word for the first time, the surrounding language can be an unnecessary obstacle. That is why early Vozelu practice can start with an individual word.
What the evidence supports
If you practise retrieval, you can remember better later. In Rowland’s 2014 review, testing had a benefit over restudying across the studies analysed, and the benefit was larger for recall tests than for recognition tests.
That is evidence for giving learners opportunities to retrieve answers. The prompt, feedback and timing also matter: with a confusing sentence, an exercise can be difficult without being useful.
There is also evidence for learning through flashcards and word lists. In a review of vocabulary-learning activities, learners gained from both. With a flashcard you can recall Spanish before you turn it over. Typing is one way to make that attempt explicit, rather than a separate learning method by itself.
Why the answer stays hidden
If an exercise colours each letter as you type, you can work towards the answer by trying combinations. In that interaction you get help before you have finished answering. From it you learn less about what you could produce unaided.
In Vozelu, feedback follows submission. You can ask to see the answer when you need help. That help is recorded separately from an answer you produced on your own. A correct retry after a correction is useful practice, but it is different evidence from remembering the word on the first attempt.
We also have a responsibility with the checker. In Spanish more than one answer can be right, and a spelling mistake is not always the same as choosing the wrong word. Clear prompts and fair corrections matter as much as the presence of a text box.
What a correct answer tells you
If you type desarrollo correctly, you could produce it in that exercise. To use it in conversation, you also need to recognise it in speech, pronounce it and find it while deciding what to say. In reading, listening and speaking you practise those other demands.
In Vozelu, word practice comes with sentences, audio, reading and grammar. Those choices and the evidence behind them are on the method page. You can try a short practice before creating an account.