All of the following are true regarding billingualism EXCEPT:

-Individuals who learn a second language during childhood are more likely to speak it with the appropriate accent.
- Those who are billingual usually demonstrate a less efficient performance on memory tasks in terms of response time.
- Individuals who try to learn a second language in adulthood are neither able to fully comprehend nor accurately speak the language.
- The more an individual knows about his/her first language, the easier it will be to learn a second language
- Individuals who learn a second language in adulthood do not appear to have as high metalinguistic skills as they would if they learned the second language in early childhood.

I believe the correct one is the third answer I'm about 70% confident with it or my other guess would be the last answer!

Your 30% guess is the right one.

I would tend to choose the second alternative as being false, but it would depend on the type of memory task being presented. If it is rote, there should be no loss of efficiency in terms of response time.

I hope this helps a little more. Thanks for asking.

To determine the correct answer, we will evaluate each statement.

1. "Individuals who learn a second language during childhood are more likely to speak it with the appropriate accent."
This statement is generally true. Research suggests that individuals who learn a second language during childhood have a better chance of acquiring the appropriate accent compared to those who learn it in adulthood. They tend to develop native-like pronunciation skills at a young age when language learning ability is at its peak.

2. "Those who are bilingual usually demonstrate a less efficient performance on memory tasks in terms of response time."
This statement is generally true. Some studies have found that bilingual individuals may demonstrate slightly slower response times on certain memory tasks compared to monolingual individuals. However, this difference is usually small and does not significantly impact overall cognitive abilities.

3. "Individuals who try to learn a second language in adulthood are neither able to fully comprehend nor accurately speak the language."
This statement is not entirely accurate. While it is true that language acquisition becomes slightly more challenging in adulthood compared to childhood, adults can still achieve high levels of comprehension and accuracy in a second language with proper instruction and practice. The ability to fully comprehend and accurately speak a second language varies depending on individual factors such as motivation, exposure, and learning strategies.

4. "The more an individual knows about his/her first language, the easier it will be to learn a second language."
This statement is generally true. Having a strong foundation in one's first language can provide a useful framework for learning a second language. Knowledge of grammar, vocabulary, and language structures from the first language can facilitate the learning process. However, it is worth noting that there can also be certain challenges associated with transferring language patterns from the first to the second language.

5. "Individuals who learn a second language in adulthood do not appear to have as high metalinguistic skills as they would if they learned the second language in early childhood."
This statement is generally true. Metalinguistic skills refer to the ability to reflect on and analyze language itself. Individuals who learn a second language in early childhood, when language acquisition is more natural and subconscious, tend to have higher metalinguistic skills compared to those who learn a second language in adulthood. However, it is important to note that this does not mean that adults cannot develop metalinguistic skills in a second language; it may just require more conscious effort and explicit instruction.

Based on the evaluation of each statement, the third statement is the one that does not accurately reflect the characteristics of bilingualism. Therefore, the correct answer is: "Individuals who try to learn a second language in adulthood are neither able to fully comprehend nor accurately speak the language."